Traffic Sources Overview

[kirk89]

Last month referring sites sent me 40.25% of total traffic and Search Engines 30.92%, direct traffic 28.16%, other sources is less than 1%. I receive about 10,000 unique hits/month. What is the maximum percentage I can expect from search engines? I’m very curious to know, if big sites (sites getting +100,000 hits per month) get majority of hits from search engines or referring sites?