Comparative Class Chart 2006
 

Thanks Noddub and Houndog. I'll throw in an update on the Comparative Class Chart, This one is largely based on an extra done for Cynthia's 2007 Pars. They use three points of reference for the grades or class levels:

1) Purse Values
2) Races for young horses (+)
3) Races for Restricted or conditioned claimers (-)

I think there are 119 as opposed to the 85 or so in the '91 chart, but, most of the extras are on the extreme cheap end, The top 10 layers have around 80 tracks in both charts.

Dick