When looking at stats like this, it would also be good to asses how much of the new users are producing quality. Whilst the ratio needs to be improved, there still needs to be an element of earning your votes. Getting ones just because you're new, is counterproductive.
Cg
Having a whale vote for a new user's post should mean that it is not a crappy post (most of the time, thogh there are also exceptions) and I have seen a lot of people with good posts that don't get much votes, so it is also not like there isn't enough good content from new users...