Conversation so far:
what year did the camaro z28 come out
The Z28 came about as a means of making the new 1967 Chevy Camaro competitive in the SCCA Trans-Am races.
how many generations of the camaro z28 are there
Four distinct generations of the Camaro were developed before production ended in 2002.
why did production of the camaro end in 2002
Chevy, a unit of General Motors, decided to discontinue the Camaro due to a drop in demand in the sports car market.

Question: how many have been sold
Self-contained rewrite: how many camaros have been sold