It can be calculated from the report below how much money Atmel got from 8 bit microcontrollers (likely 8051+AVR8+others), this year and in 2011. I made the calculation and it appears that they earn two - three times more money from 8 bit families than from 32.
"Moving to a discussion of our business segments. For our Microcontroller business unit, Microcontroller revenue of $226 million increased 3% sequentially and was down 25% as compared to the third quarter of 2011.
For the second quarter in a row, both our core microcontroller revenue and maXTouch revenue grew sequentially.
By product family, during the second quarter, our 8-bit micros were down 7% sequentially, and were down 35% year-over-year. While 32-bit microcontrollers increased 33% sequentially and increased 11% year-over-year."
Source: Atmel Management Discusses Q3 2012 Results - Earnings Call Transcript | Seeking Alpha