http://migration.ucdavis.edu/mn/more.php?id=3128_0_5_0
"South Africa enacted an Immigration Act in April 2002 and amended it in October 2004 in a context of growing xenophobia and the existence of simultaneous labor shortages and surpluses. South Africa has experienced an exodus of professionals to industrial countries and an influx of less skilled workers from sub-Saharan countries, a mix that fosters restrictionism among many South Africans. However, there is little reliable data on either flow. "
