Climberben,
The only % I can give you are the ones Paul has in his original registry, they are as follows:
200 3%
289 62%
302 27%
390 2bl 2%
390 4bl 5%
428 .6% (that is point 6 %)
These are based on the original surveys turned in back in 1989 and where extrapulated from the total number of GT/CS's producted.
Doug