Because of gmail's excellent spam filter I get around 1 to 2 in a few weeks or a month, the really creative ones get through but don't last long as I mark them as 'spam'. In my spam folder there are thousands!
For my @Yahoo and @Gmail accounts I almost never get spam. It all goes to the Spam folder where there are tons of it!
50 -100 a day. Some of them are my fault, so I delete them. Some of them are nasty. Once I had to access my personal e-mail account during a presentation (the laptop was wired to a large screen) and thankfully I didn't have any Viagra or worse ads beaming out of my inbox.