I have no idea, but definitely more since I entered the professional world a bunch of years ago. If I had my druthers, all I'd wear would be sneakers and flip flops (weather permitting). But now I have black boots, black flats, black sandals for summer, brown boots, brown flats, brown Doc Martin-ish shoes for when I can get away with a more casual work look, tan heels, pink sandal heels 🙂)), and maybe assorted others that I don't wear. I like clothes shopping but not shoe shopping. Now that I have all of the above shoes, I'm good. But when I first had to buy shoes to go with my work clothes, I was very bummed. Nothing quite as annoying as having to shop for something.
Oh, not to mention riding boots, work boots, sneakers for the stables, hiking boots...you know, the typical functional ones. So, a bunch. But for the most part, they all have their function (except my 2 pairs of cute sneakers, one blue and one pink/grey...those are just for fun).