Where can I find statistics on accidents and incidents in aviation?

There is information on The Swedish Transport Agency's website. Airlines, airports and air navigation service providers, are according to the regulations required to report deviations from normal operation to the Agency within 72 hours. A deviation does not need to involve an accident or incident, it could for example be a violation of the minimum separation, that is, when two aircraft during any part of the flight has come closer to each other than the safety margins indicate. Further information of airplane accidents from around the world can be found here. All aviation accidents since the 1940s are reported on this website.