From a Sex and Electronics article: "Women buy 57% of consumer electronics (to the tune of about $US80B), but influence 90% of all CE purchases." I find those numbers shocking.
But I am not married. The figures are from CEA and Best Buy respectively, and were presented at a panel at CES on Sex and Electronics and how to design gadgets for women. Their list of how to improve gadgets for women are incidentally not all that different from a list of improvements that all gadget makers need to adhere by, regardless of the stereotypical sex their marketing team is targeting in sales.