[USA] Rise, Peak and Decline: Trends in U.S. Immigration 1992 - 2004- / Pew Hispanic Center, Sep 2005

PDF - http://pewhispanic.org/files/execsum/53.pdf
"'The number of migrants coming to the United States each year, legally and illegally, grew very rapidly starting in the mid-1990s, hit a peak at the end of the decade, and then declined substantially after 2001. By 2004, the annual inflow of foreign-born persons was down 24% from its all-time high in 2000, according to the Pew Hispanic Center analysis of multiple datasets collected by the Census Bureau and other government agencies.'"