sentences:  According to the text of Immigrant America (p. 69), there were 554,897 Jamaican-born people living in the U.S. in 2000.This represents 61% of the approximate 911,000 Americans of Jamaican ancestry.Many Jamaicans are second, third and descend from even older generations, as there have been Jamaicans in the U.S. as early as the early twentieth Century.