metrics.tpo user graphs are very similar for european countries

perhaps just a coincidence, but germany, france, switzerland, austria, and US all have very similar usage graphs.

See https://metrics.torproject.org/users.html?graph=direct-users&start=2011-05-16&end=2011-07-10&country=de&dpi=72#direct-users

versus

https://metrics.torproject.org/users.html?graph=direct-users&start=2011-05-16&end=2011-07-10&country=fr&dpi=72#direct-users

versus

https://metrics.torproject.org/users.html?graph=direct-users&start=2011-05-16&end=2011-07-10&country=us&dpi=72#direct-users