More women are doing that than in the past, according to a study by the Commerce Department’s Economic and Statistics Administration. From 1997 to 2007, women-owned businesses in the U.S. grew by 44 percent, or twice as fast as those owned by men. The percentage of startups led by women that sought venture capital increased to 20 percent in 2011 from 12.6 percent in 2000, according to the University of New Hampshire’s Center for Venture Research.