Curt Vendel has a posted that you can download the info he has. He didn't post the hardware sales for the system from 1986 to 1990.
I used excel to add the game totals for each game from 1986 to 1990.
Some of Atari's sales for the 2600 are missing due the system got it's start in 1977. The sales total also don't show the sales for the games on clearance or games sold brand new by other store after 1990 including O'Shea.
I made a zip file for anyone to download the info.