Since 1977, New Zealand has celebrated Arbor Day on June 5, which is also World Environment Day, prior to then Arbor Day, in New Zealand, was celebrated on August 4 – which is rather late in the year for tree planting in New Zealand hence the date change.

Since the late 1930s alloy steels have been used for frame and fork tubes in higher quality machines.

Since the late 1980s, evidence has become available that instillation of BCG into the bladder is an effective form of immunotherapy in this disease.

Since its introduction at games by the " Roar from 34 ", led by Wild Bill Hagy and others, in the late 1970s, it has been a tradition at Orioles games for fans to yell out the " Oh " in the line " Oh, say does that Star-Spangled Banner yet wave " in " The Star-Spangled Banner ".

Since the late nineteenth century, the South used a colloquial term, the one-drop rule, to classify as black a person of any known African ancestry.

Since the late nineteenth century, only two brief periods of violence have marred its democratic development.

Since there is no evidence that late Maastrichtian nonavian dinosaurs could burrow, swim or dive, they were unable to shelter themselves from the worst parts of any environmental stress that occurred at the K – T boundary.

Since the late 1990s, Orange has also been working in conjunction with singer / songwriter Craig Deanto, and they have released an album titled Who Hears the Cries.

Since 2000Actually the most important are: Cable Onda ( 40 % share ), Cable and Wireless ( started on late 2009 ) and CTV.

Since these geographic considerations imply that, not including the hill within, the walls would be willfully making the city prone to attack from it, some scholars, including the late 19th century surveyors of the Palestine Exploration Fund, consider it unlikely that a wall would ever have been built that would cut the hill off from the city in the valley ; archaeological evidence for the existence of an earlier city wall in such a location has never been found.

Since the late 1990s, custom dog tags have become fashionable amongst musicians ( particularly rappers ), and as a marketing giveaway item.

Since the late 1980s, prominent individuals and organizations have recognized the seminal importance of Engelbart's contributions.

Since the late 1990s, Dublin has experienced a significant level of net immigration, with the greatest numbers coming from the European Union, especially the United Kingdom, Poland and Lithuania.

Since the late 19th century, differential geometry has grown into a field concerned more generally with the geometric structures on differentiable manifolds.

Since then McLean has stated that the lyrics are also somewhat autobiographical and present an abstract story of his life from the mid-1950s until the time he wrote the song in the late 1960s.

Since the late 1980s, the field has been revived in the wake of progress made in the related fields of psycholinguistics, neurolinguistics, evolutionary anthropology, evolutionary psychology, and cognitive science.

Since the late ' 60s, the exploitation of oil increased production and reserves are estimated at 4. 036 million barrels

Since its acquisition of Verant in late 1999, SOE develops, runs, and distributes EverQuest.

Since the late 1990s, almost all release prints have used polyester film stock.

Since the late 1990s, bzip2, a file compression utility based on a block-sorting algorithm, has gained some popularity as a gzip replacement.

Since the late 1970s, towns in the north began industrial production through maquiladoras, especially in San Pedro Sula and Puerto Cortés.

Since the late 1980s, Indonesia has made significant changes to its regulatory framework to encourage economic growth.

* interface to personal computers: Since the late 1990s, most pumps can interface with personal computers for managing and documenting pump programming and / or to upload data from the pump.

Since the late 1990s, the Jamaican government has set an agenda to push the development of technology in Jamaica.

Since the late Middle Ages the Kingdoms of England and Scotland had been evolving towards a quasi-oligarchical or collegiate form of government in which the monarch was held to rule with the consensus of the land-owning upper classes.

Since its introduction in the early 90s, new computer video techniques have been introduced which the original AVI specification did not anticipate:

Since the 90s, Tangerine Dream have also recorded cover versions of Jimi Hendrix ' Purple Haze ( first on 220 Volt Live ) and The Beatles ' Eleanor Rigby, Back in the U. S. S. R., Tomorrow Never Knows, and " Norwegian Wood ".

Since the late ' 90s / early ' 00s female artists have taken a more visible role in the Finnish pop music scene, not only as performers, but also songwriters.

Since the late 90s, instead of forced purism, Croatian has been evolving naturally, developing its own words and forms, thereby increasing the distance separating it from other South Slav languages.

Since the middle ' 90s a number of new projects have arisen under the Masada banner.

Since the end of 90s, many universities in Georgia ( mostly private ) have introduced limited educational programs allowing students to graduate with a bachelor's degree ( 4 years ) and then earn the master's degree ( 1 – 2 years ) while preserving the old 5 – 6 year scheme.

Since the late ' 90s, melodic death metal bands have added more melodic choruses and riffs and have used keyboards more prominently than other death metal bands ; their lyrics, unlike those of death metal, did not focus on death, violence, gore, horror, or blood for the most part.

Since the middle of the 90s Bargeld has appeared live with his solo Rede / Speech Performances.

Since Air Miami's demise in the mid ' 90s, Mark has continued to release various solo projects, as well as albums with his bands Cotton Candy and Flin Flon, and continues to run the TeenBeat label as well.

Since 2006, Skitz has released 2 rock compilations called SkitzMetal and SkitzRocks featuring 80s and 90s rock originals like Quiet Riot's " Cum On Feel The Noize " and Scorpion's " Wind Of Change " and some dance remakes of glam rock hits.

Since the early 90s bands like Rammstein, Eisbrecher, KMFDM, Oomph !, Tanzwut, and Megaherz developed this kind of Rock music as a mixture of rock, heavy metal and electronic music.

Since his Hard Station album ( 1981 ) Brady has been on various major labels until the late 90s when he started his own label, PeeBee Music.

Since the early 90s attention has shifted slightly towards that idea that carotenoids have dual but mutually incompatible roles in immune function and signalling.

Since its initial incarnation in the mid 90s, the I3 protocol has gone through 3 revisions, adding various new features and suggestions for a future inter router network.

Since the late ' 90s, the culture of poverty has witnessed a resurgence in the social sciences, although most scholars now reject the notion of a monolithic and unchanging culture of poverty and attribute destructive attitudes and behavior not to inherent moral character but to sustained racism and isolation ( Small M. L., Harding D. J., Lamont M., 2010 ).

Since the late 90s, Shroff seems to have moved away from lead roles in Hindi movies and has been seen more often in strong character roles.

Since the early 90s the team has concentrated on running Sports cars and GT cars running the works BMW operation in the French Supertouring Championship, winning the FIA GT Championship and the Le Mans 24 Hours in the GT2 class with a Chrysler Viper GTS-R and overall for Mazda 787B in 1991, on their second attempt and first after a decade ; preparing the Renault Clio S1600 for rallying and winning the ice racing Andros Trophy with a Toyota Corolla driven by Alain Prost.

Since the replacement in the 1980s and 90s of electromechanical exchanges by modern digital ones, the function of a Class 5 switch in rural areas is often performed by some form of remote switch or Remote Digital Terminal installed at the original switch site to handle local switching or concentration, respectively.

Since the 90s, the ROK Navy has been steadily upgrading its naval forces.

Since its introduction in the mid ' 90s, like similar games, the " Shutokō Battle " series never used licensed cars but the usual type designation such as " TYPE-86 " and later " TYPE-AE86L3 ".

Since the late 90s there have been two versions of Gene Loves Jezebel, causing confusion among fans.