I've talked to Jim a couple of times, but I didn't get any indication whether they were plugging the info into a database, or if they would make any of the production information public at any time.
Any registry gathering data now could give some rough ideas on color ratios, but nothing I'd feel comfortable with passing along. Although it is widely quoted that approximately 3 out of 10 1968 Firebirds WERE Verdoro Green, my collection is 50% when cars were selected without preference to any color.
1 '67 Coronado Gold 3 '68 Verdoro Green 1 '68 Meridian Turquoise 1 '69 Goldenrod Yellow
Vikki 1969 Goldenrod Yellow / black 400 convertible numbers matching