By far not as regularly as in the United States. Just take the list from http://www.rp-online.de/panorama/die-schlimmsten-amoklaeufe-... - most of these are US based.

Or, take the list at http://de.wikipedia.org/wiki/Amoklauf_an_einer_Schule#Deutsc... - six in the last 11 years, way more (and especially: much more violent!) in the US!