3 each year.
Since official record keeping began in 1950 3 or 4 tornadoes have affected Glendale, Arizona. Before that it would be difficult to determine how many tornadoes struck there.
There have been 111 deaths from tornadoes in Texas from 2000 to 2007.
worldwide data is not available. Since 2000 there have been 16,818 recorded tornadoes in the U.S. Note that the figure for tornadoes so far in 2013 is only a preliminary estimate.
In the years 2000-2010 there were 13,865 confirmed tornadoes in the United States, with thousands more worldwide.
From 2000 through 2011 there were 669 confirmed tornadoes in Iowa. In addition there is a preliminary count of 16 tornadoes so far in 2012 (as of December 6). This brings the total to 685 tornadoes.
Since official record keeping began in 1950 there have been 229 tornadoes recorded in Arizona. The true figure may be higher than this as in the earlier part of this period the majority of weak (F0 and F1) tornadoes were likely missed.
From 2000 to 2011 Kansas experienced 1,286 tornadoes with a preliminary count of 87 so far in 2012 (as of December 6). This gives a total of 1373 tornadoes.
There were 59 tornadoes recorded in Kansas in 2000.
Arizona does get tornadoes from time to time. But they are relative rare because Arixona is a dry state that doesn't get many thunderstorms, and tornadoes need thunderstoms to form.
There were 55 confirmed tornadoes in Illinois in 2000.
There were 1075 recorded tornadoes in the U.S. in 2000.
There were 147 confirmed tornadoes in Texas in 2000.