So far in the world tornadoes have killed at least 572 with at least 550 of those deaths occurring in the U.S.
In 2011 there were 1,626 tornadoes and 552 deaths.
The 2011 super outbreak resulted in 322 deaths from tornadoes. 24 others died from other effects of the outbreak not related to tornadoes for a total of 346.
Tornadoes caused 44 deaths in the U.S. in 2010 and an unknown number worldwide.
Based on U.S. statistics about 2% of tornadoes cause deaths which works out to about 25 killer tornadoes in an average year.
There were 103 tornadoes in Texas in 2011.
There were 73 tornadoes in Illinois in 2011.
The were 55 tornadoes in Nebraska in 2011.
There were 51 tornadoes in Iowa in 2011.
There were 72 tornadoes in Indiana in 2011.
There were 118 tornadoes in Oklahoma in 2011.
There were 325 tornadic fatalities from the April 25-28 2011 tornado outbreak of which 320 were on April 27.
There were 39 tornadoes in Florida in 2011.