A remarkable piece of news came out along with last month’s job report — of the 74,000 jobs added to the U.S. economy in December, all of them  went to women .

Women today are definitely doing better than they were in the depths of the recession — in between June 2009 and February 2011, private-sector employers  hired 503,000 men , while 141,000 women lost their jobs. But the December jobs number still isn’t necessarily good news for women in the workforce. Most of the job gains in December were “concentrated in low-wage sectors,” and women already make up  nearly two-thirds of minimum wage earners in the country.