Thread moved to MKIII Discussion.
Unfortunately production information is rather scarce. You could try the following company to see if they have anything conclusive. The '91 model year in general saw a bit over 3,500 or so total. White was probably the most common color, the auto transmission I am unsure of. (EDIT: These are only their number in North America, they were much higher elsewhere.)
EDIT 2:
http://www.productioncars.com/production-numbers.php