We tried to get a number on Daytona 955i produced in 2002 a few years back. As it turns out Triumph doesn't really release by model production numbers very well. Total bikes produced can be found for a given hears,but breaking that into the respective models is more of a challenge.
I recently saw 18000 as a number of total rockets made, ever, so if evenly distributed that would be, 4500 of each model, but I'd bet that is very far from accurate.