I presume that a big part of these 40% are single or single-parent households. I'd wager (a little) that if you only consider (heterosexual) couples, then you

I presume that a big part of these 40% are single or single-parent households. I'd wager (a little) that if you only consider (heterosexual) couples, then you will have mostly men making more money... Not saying that that's good or bad...