I haven't looked into it, but just from memory of some of her wins I tend to think it would be pretty difficult to make a real case that Emily was 400-500 standard on a consistent basis last year.
Essentially she has probably done better than most of us expected and much much better than some expected.
I made it 5 wins in a year against top 300 players after checking I think. My point stands I feel despite loving Ems effort and attitude. There is no chance whatsoever of her getting a WC for Wimbledon as it would take a ranking inside the top 200 now.