'while the collective work force of those 10 companies grew by 16 percent between 1999 and 2005, the proportion of Hispanic workers declined by 11 percent, to about 2,200; they now make up about 7 percent of the total work force. Black workers declined to 2 percent of the work force, down from 3 percent. The share of women in the Silicon Valley-based work force was 33 percent, dropping down from 37 percent in 1999. Asian workers increased to 49 percent from 45 percent, and white workers declined to 44 percent from 45 percent. The trends continue into the management ranks. What gives? And is anything being done about it?'