latest dev blog for EVE Online is from CCP Diagoras and contains some numbers and information about ship losses through PvP over the last year from April 2008 to April 2009. Firstly there are some very specific subscriber numbers. At the end of April 2008 the game had 234,314 active paying accounts, which had grown to 299,064 by the end of April 2009, which fits nicely with their statement a few days later that the game had passed 300,000 paying subscribers. Using these numbers and the number of ship losses which involved another player attacking he comes up with the information that in April 2008 there were 0.61 ship losses per subscriber in that month. By April 2009 this had raised to 0.67.
The blog then follows up with a series of graphs that show more specific PvP ship losses per month. Some interesting highlights include how dreadnaught losses fluctuate over time compared to the number of each capital ship type destroyed per month which reflects the pattern of big battles over that time, and the numbers of Battleships and Interceptors destroyed which show the preference players have for Caldari and Gallente ships.