"Women-Owned Businesses: Numbers Climb, Revenue Lacking" which is very interesting. It summarizes a recently released report entitled Survey of Business Owners: Women-Owned Businesses: 2007.
Here are a few highlights but click on the title above and read the whole thing for yourself.
There are more women-owned businesses in the U.S. than businesses owned by men but the women's are generating less revenue. States with the largest pool of women-owned companies were California, Texas and New York. Maryland was top as the state with the highest percentage of businesses with a female owner. Oklahoma falls in the 24.8% to 28.7% of all businesses are women-owned. The national Average is 28.7% Women control the majority (52%) of all businesses in the health care and social assistance sector.
Here is the Census Bureau's Dec 7, 2010 press release on their recent survey.