I receive thousands of emails/day at work... it's hard to quantify what is spam. I generally don't read most of them, but I keep them for reference and have to occasionally glance at them in case there's a flood of error message alerts.
I probably send an average of 10 work emails/day and 0 personal. 99% of my online personal communications are via facebook or g-chat. the only person who ever really emails me is my mom, and that's pretty rare.