Any one got a guess how many SF fans there are out there?

It was never that big of a game even &quot;back in the day&quot; (unfortunately).  And of course over the decades (man does that make me feel my age and then some) most of us drifted away.<br /><br />Anyone want to take a shot at guessing how many SF fans there were, and how many there are today?<br /><br />Yeah, I know it's a lame question...I'm bored tonight.