Spoiler alert: the country that requests the most data from tech companies is the US. This should really be no surprise for anyone who's been following the news lately but their dominance is actually pretty admirable. Take that you Frenchies!
Actually, the UK and France might actually be more persistent, given both countries have nearly half the US requests, with a significantly smaller population.
Reuters cooked up this graphic by culling all the data from Google's 2012 Transparency Report, Microsoft and Skype's 2012 Law Enforcement Requests Report and Twitter's Transparency Report. You can see in the graphic how most of the requests were disclosed. [Reuters Tumblr]