http://investor.google.com/pdf/2014Q1_google_earnings_slides... (slide 3)
(revenue) $3.4B network $10.5B Google properties $1.5B other
http://investor.google.com/pdf/2010Q1_google_earnings_slides...
Check out that dip in '09. Interesting.
Is it? How much do Google make from the adsense publisher network vs advertising directly on Google properties?