Googles released what it calls its "transparency report", so you can choose a country and see how many govt requests there were on information about users. They also offer raw stats for their traffic usage.
Heres the UK report for the last 6 months.
United Kingdom
1343 data requests
48 removal requests, for a total of 232 items
62.5% of removal requests fully or partially complied with
* Blogger
o 1 court orders to remove content
o 1 items requested to be removed
* Video
o 3 court orders to remove content
o 32 items requested to be removed
* Groups
o 1 court orders to remove content
o 1 items requested to be removed
* Web Search
o 8 court orders to remove content
o 144 items requested to be removed
* YouTube
o 6 court orders to remove content
o 29 non-court order requests to remove content
o 54 items requested to be removed
Feel like a secret agent
Google Transparency Report: Government Requests
