Women's Bureau, U.S. Dept. of Labor site has many statistical articles including:
Laborsta from the International Labour Organization has labor-related statistics from other countries.
Professional Women: A Gendered Look at Occupational Obstacles and Opportunities datasheet by The Department for Professional Employees of the AFL-CIO Labor Federation.
Job Patterns for Minorities and Women in Private Industry statistical tables published by
The U.S. Equal Employment Opportunity Commission (EEOC). Information is available at the national or individual state level for grouped categories