2010-04: some interesting patterns are stable over the years: traffic drops by 25% for every weekend, over christmas, and during summer vacation time.
Current usage averages for every day: 600.000 hits, 9000 visitors, and 9 GB of traffic.
Donations: ≈ 1 (one) per month.
2005-02: temporarily the hits rose to 600,000/day, visits to 20,000/day, and traffic to >20 GB/day. So on 2005-02-14 my provider blocked the site without telling me! I changed a few things and now my contract should cover it. The donations trickling in right now pay for the site, THANK YOU.
in 2004, the site averaged over 100 GB of traffic per month