Unmarried women accounted for 21% of home purchases in 2009, while unwed males were 10% of the buyers, according to a National Association of Realtors report in November. It’s a dramatic shift from 1981, the first year the numbers were tracked, when single women and men each accounted for 10% of home sales. Still, some industry professionals have been slow to take note of females’ robust activity. Single women have held steady at the 20 % mark for more than five years, yet when the Urban Land Institute hosted its annual real-estate conference in late April, analysts had to remind the audience to expect big numbers from young, single female buyers.