I am out of the work world, but in the US women wearing dresses certainly has declined. I like wearing dresses and I sometimes think I'm the only one in the mall wearing a dress.

And virtually none wear hose.

However, in Australia I see a lot more women wearing dresses (I spend about two months of the year there). But I never see women wearing hose there.

So my preference is dresses or tops and skirts but I will wear jeans out occasionally.