Men continue to make up the majority of doctoral scientists and engineers in the United States, according to the US National Science Foundation's most recent 2006 Survey of Doctorate Recipients, released on 24 September. The report says that men comprise some 68% of America's 561,230 doctoral scientists across all science fields and 90% of the nation's 121,520 doctoral engineers. The last survey, conducted in 2003, found that men represented 70% of doctoral scientists and 91% of doctoral engineers. Of the 10,920 doctoral scientists and engineers across all fields who are neither working nor seeking work, three-quarters are female, the latest report says, up from the two-thirds reported in the 2003 survey.