Estimates of the total number of Afrikaans-speakers range between 15 and 23 million.

Estimates of the number of people around the world who speak Bulgarian fluently range from about 9 million to 12 million.

Estimates of the total number of Protestants are very uncertain, partly because of the difficulty in determining which denominations should be placed in these categories, but it seems clear that Protestantism is the second largest major group of Christians after Catholicism in number of followers ( although the Orthodox Church is larger than any single Protestant denomination ).

Estimates of the number of major mass extinctions in the last 540 million years range from as few as five to more than twenty.

Estimates of the amount of effort required to build Maeshowe vary ; a commonly suggested number is 39, 000 man-hours, although Colin Renfrew calculated that at least 100, 000 hours would be required.

Estimates of the number of marchers, most of whom were men, ranged from 400, 000 to nearly 1. 1 million, making it the largest gathering of its kind in United States history.

Estimates range as high as two million people, but more recent studies place that number closer to 200, 000.

Estimates for the number of Taoists worldwide range from twenty million and possibly to as many as 400 million in China alone.

Estimates of the number of prostitutes in London in the 1850s vary widely ( in his landmark study, Prostitution, William Acton reported that the police estimated there were 8, 600 in London alone in 1857 ).

Estimates vary about the number and quality of financial jobs in the city.

Estimates vary widely as to the number of gay men imprisoned in concentration camps during the Holocaust, ranging from 5, 000 to 15, 000, many of whom died.

Estimates of the number of Arabs displaced from their original homes, villages, and neighborhoods during the period from December 1947 to January 1949 range from about 520, 000 to about 1, 000, 000 ; there is general consensus, however, that the actual number was more than 600, 000 and likely exceeded 700, 000.

Estimates of the number of speakers vary: the 1996 census reported 160, 000,

Estimates on the number of DF-11s in service vary between 500 to 600.

Estimates of the number vary from 30 to 300.

Estimates for the pre-contact native population in California have been based on a number of different sources ( and therefore vary substantially ), but indigenous peoples may have numbered as high as 300, 000, divided into more than 100 separate tribes or nations.

Estimates put the number of casualties between 200 and 1000.

" Estimates of its membership in 1944 range from 200, 000 to 600, 000, with the most common number being 400, 000 ; that figure would make it not only the largest Polish underground resistance movement but one of the three largest in Europe during World War II.

Estimates of the total number killed at Babi Yar during the Nazi occupation vary.

Estimates vary as to the number of Mexican raiders who attacked the soldiers, anywhere from 60 to several hundred.

Estimates of the number of different plant species in the park place the figure at 500.

Estimates of the total number of Cambodians living in the city of Lowell range from 11, 000 to 25, 000-35, 000.

Estimates are produced by Brazil's National Institute for Space Research ( INPE ) for the entire Brazilian Legal Amazon by visually interpreting satellite imagery from the Landsat Thematic Mapper.

Estimates are that 90 % of all commercially produced chemical products involve catalysts at some stage in the process of their manufacture.

Estimates show that about 97 % of modern cheerleading participants overall are female.

Estimates for the main centres of Christadelphian population are as follows: United Kingdom ( 18, 000 ), Australia ( 9, 987 ), Malawi ( 7, 000 ), United States ( 6, 500 ), Mozambique ( 5, 300 ), Canada ( 3, 375 ), New Zealand ( 1, 782 ), Kenya ( 1, 700 ), India ( 1, 300 ), Tanzania ( 1, 000 ), and Philippines ( 1, 000 ).

Estimates are that between 45 % and 85 % of Ireland's population emigrated, to countries including Britain, the United States, Canada, Argentina, Australia and New Zealand.

Estimates for the value of the gold which might be extracted through open-pit mining are as high as $ 20 billion.

Estimates are that the Mongol armies reduced the population of China by nearly a third.

Estimates of lesbians are sometimes not differentiated in studies of same-sex households, such as those performed by the U. S. census, and estimates of total gay, lesbian, or bisexual population by the U. K. government.

Estimates from 2006 showed that only three viable nesting sites were available for this ancient bird, one located 80 miles from Dubai, and two smaller sites in Oman, all of which are in the process of becoming real estate developments.

Estimates of TAI are also provided in real time by the institutions that operate the participating clocks.

* Official Estimates are determined by a combination of information from one or more of the other three methods.

Estimates of the death toll, including both civilians and Red Guards, from various sources are about 500, 000 between 1966 and 1969.

Estimates are the upwards of 50, 000 monks lived in this area at any one time.

Estimates of the Queen's wealth vary, depending on whether assets owned by her personally or held in trust for the nation are included.

Estimates for the global biomass of species and specie groups are not always consistent across the literature.

Estimates of rates of short GRBs are even more uncertain because of the unknown degree of collimation, but are probably comparable.

Estimates for the incidence of androgen insensitivity syndrome are based on a relatively small population size, and thus are known to be imprecise.

( Estimates for other countries are also available from the OECD.

Estimates of worldwide and country-wide numbers of individuals with disabilities are problematic.

Estimates are that the English had, by this time, traveled approximately and rested the day before the battle.

In 1987 Geraldo Rivera produced a national television special on the alleged secret cults, claiming " Estimates are that there are over one million Satanists in United States and they are linked in a highly organized, secretive network.