The simple numbers show that separatist terrorism is by far the biggest driver of terrorism in Europe. Spain is at war compared to the rest of the European Union with 58.2% of all terrorism in the union being in Spain. It will be interesting to see if the Basque terrorist group ETA's self-declared cease fire will have any real impact in numbers.
Leftist terrorism is on the rise. According to the report, "Spain, Greece and Italy reported a total of 40 attacks by left-wing and anarchist groups for 2009. This constitutes an increase of 43 % compared to 2008; the number of attacks more than doubled since 2007." The economic downturn's stirring of Leftism combined with the never finished offed remnants of Cold War advanced fronts like in Greece have been the main drivers of Left terrorism.
Rightist terrorism continues at minimal levels being limited to Hungary.
Somewhat surprisingly there has been only one registered Islamic terrorist attack in 2009.
There is a big caveat to give with these numbers though. Hate crimes and other types of lesser terrorism are not counted. I am not sure how the numbers would change but Irish Republican Army drug kingpins, English Defence League street thugs, Greek Reds targeting businessmen, and Islamist urban micronations harassing homosexuals and Jews are all likely to increase the number of violent attacks.