Since 2000 Slyck.com has been gathering data to track usage of some of the largest P2P networks. The report shows that since Jan 2003 the total amount of members on these filesharing networks has almost doubled.
In March of 2005, Slyck compiled our collected data. Starting with January of 2003, the respective statistics for eDonkey2000, DirectConnect, FastTrack, Gnutella and Overnet were averaged per month. Unfortunately there is no accurate way to gauge BitTorrent’s population (other than bandwidth consumption), therefore it is excluded. We then released our "Stats Expanded" section, which graphically depicted the growth or decline of these five networks.