if you want numbers, you should setup a web pool. E-mail replies, no matter how nice they are, won't give you numbers.
And any such numbers will be self-selecting and hence unreliable. I don' t know how many people are on this list, but regular posters are a subgroup of a few dozen and I'm sure the lurkers are many many more.
(Just for the hell of it: 64, retired, used Linux since 1995 and Unix since 1976)