Of the models I have so far (105), I have painted 75 (for a completion of 71.4%) - all of this is from this year though, since I only started playing back in the spring.
However, once my Black Friday order arrives, I'll be "dropping down" to 75/129 painted (58.1%), which'll make me sad, until I realise that I'll have Leveticus and more gremlins to play with