It does depend on who was asked and sample sizes, etc.
However I think most people don't want a label or don't think they are feminists because of the extremist ones who say you have to be or think x or y or z. For example I had one of those extremist type feminists tell me I was basically a total brainwashed idiot, too oppressed by patriarchal demands on women, to be a free woman - all because I chose to stay at home with the children. To me its the best "job" I could ever have. It doesn't mean I've done it for some man or because I'm brainwashed by patriarchal demands - I did it for me, because I want to be at home with my children everyday. A true feminist would value a woman being able to freely choose whether she was a SAHP, WAHP or WOHP. and that a man should freely be able to make that same choice. They are all valid choices.
I think its probably more like 99% when you look at the core issues - equal pay for equal job, equal opportunity to participate in everything from education, to voting, to sports; equal job opportunity, freedom to choose what we want to do with our lives, etc