Modern American families a new report today confirmed what millions of us already know that the powerhouse driving so many families are moms who work outside the home. They're the primary breadwinners in a whopping 40% of families nearly four times the number in 1960. ABC's Lindsey Davis has more on what's changing what it means for all of us. -- par seventy is a mother wife and successful business owner. Her husband is massage therapist. I -- the breadwinner for our family who -- almost eight years. According to. Compare that to 18% in Canada. And just 10% in European households -- 100%. Single. Working -- and only one. Unfair to support children. Marsha Greco has been the bread -- mom for 21 years. -- -- -- that my mommy guilt you know I always wanted to be everywhere at the same time and I could never do that. But Carol Evans president of working mother media says the times -- caught up with this shift. This country is sorely lacking. In the basic support that a woman needs. To beat the breadwinner last year full time employed women still -- just 81% of the salaries of their male counterpart. And they have more cost American families pay about 23%. Of their net family income on child care. Compare that to France where there's government help and families only pay 10% of the net family income. And the US is one of only three countries that does not guarantee paid maternity leave together with Swaziland and -- -- New Guinea. As a crisis really. Of action of inaction of congress with so many working mothers now bringing home the bacon. -- suggest it's time for America to wake up and smell the coffee. Lindsey Davis ABC news New York.