The UN Economic Commission for Europe (ECE) Trade Division, Timber Section, periodically collects and publishes fire statistics of the ECE member states (all Western and Eastern European countries, countries of the former Soviet Union, the U.S.A. and Canada). The last data set covers the period 1995-97 and is available as a UN publication:
ECE/FAO 1998. Forest fire statistics 1995-1997. Timber Bulletin, Vol.LI (1998), No.4. ECE/TIM/BULL/51/4, New York, Geneva, 19 p.
The statistics can also be downloaded from the Internet: