There were 660 recorded tornadoes in the U.S. in 1968. Note however that at this point in history the majority of weak tornadoes were missed and most tornadoes are weak. The actual number of tornadoes was probably much higher than this figure, possibly more than double.
There were 1297 recorded tornadoes in the U.S. in 1992.
There were 1082 recorded tornadoes in the U.S. in 1994.
There were 1235 tornadoes recorded in the U.S. in 1995
There were 1173 recorded tornadoes in the U.S. in 1996.
There were 1132 recorded tornadoes in the U.S. in 1991.
There were 1173 confirmed tornadoes in the U.S. in 1993.
There were 940 tornadoes recorded in the U.S. in 2012.
There were 1265 confirmed tornadoes in the U.S. in 2005.
There were 934 tornadoes recorded in the U.S. in 2002.
There were 1,817 tornadoes recorded in the U.S. in 2004.
There were 1,103 recorded tornadoes in the U.S. in 2006.
Global data is not available, but the US had 1075 recorded tornadoes in 2000.