estimate can be found at http://pewhispanic.org/files/reports/107\\... . Our own analysis shows no indication that the share of illegal immigrants with education beyond high school has changed significantly in recent years, though the share who are high school dropouts has fallen modestly and the share with a college degree has increased. But these changes do not impact the method used in this study because the share with no education beyond high school has remained the same. 34 These estimates, like all those in this study, are based on three-month moving averages. These figures include adults of all education levels. In February of 2007 (January/February/March) the CPS shows that the 18- to 40-year-old population from these five countries stood at 2.8 million. In February 2009 it was 2.5 million. China includes Hong Kong and Taiwan. 35 In a telephone interview conducted June 12, 2009, Gregory Weyland, a survey statistician in the Current Population Survey branch at the Census Bureau stated, "Weighting control changes are implemented in January of each year, so a drop after July could not be due to technical issues like methodological changes in how the survey weights are calculated." 36 The total Hispanic population age 16 and older in the CPS was revised downward by 349,000 in January 2008, primarily because the Census Bureau estimated that the level of net immigration has fallen. The Bureau makes weighting adjustments to the Hispanic population ages 16 and older, not the foreign-born specifically. Being foreign-born is a characteristic that varies based on