I would say about 95% of the emails I receive are absolute garbage and can be instantly deleated. I do try and keep on top of them but I'm currently at around 1000 emails.

5%
Family/band members

95%
Groupon offers
Flight deals
Hotel Deals
Play.com deals
Online betting
Short-term loan offers
Credit card offers
Cash into Gold deals
Bar offers
Restaurant offers
Male impotency solutions
Female impotency soloutions
RSPCA
Leg waxing treatments
Mental Health questionnaires
Midget wrestling tournament application forms