I could find no data for the year 2011. The lastest year was 2008 with 45 reported crop circles in the US alone. I could find no statistics for a global-wide total.
Hundreds of crop circles have been reported around the world. Many of these have later been found to be hoaxes but there still remain a percentage that have defied explaination.
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Many times when UFO sightings are reported, crop circles are found nearby. But as far as I know nobody has ever seen aliens make crop circles.
"There are roughly around 150,000 construction site accidents reported each year, 1,000 deaths due to construction accidents, this year 2011 there have been only 12 construction accidents reported to OSHA."
There were many tornado outbreaks in 2011. Here are the figures for the most notable outbreaks: April 14-16: 323 reported, 178 confirmed April 25-28: 492 reported, 350 confirmed May 21-26: 319 reported, 239 confirmed The number of confirmed tornadoes is lower because not all reported tornadoes are confirmed and some tornadoes were reported more than once.
Below are a couple of sites with the most recent UFO reports.
There are approximately 650 to 700 reported sightings each year world-wide.
There were 81 reports of tornadoes in Nebraska in 2011. However this only corresponds to only 55 actual tornadoes as sometimes the same tornado is reported more than once and some reports cannot be confirmed.
According to the US census there were a reported population of 335,709 people in Tampa and 2011 reported 346,037 people. Tampa is estimated 2,201 Sq mile.
According to the 2011 census, there are 33,714 same-sex couples in Australia, of which 1,338 reported their relationship as marriage. 96% reported as de facto relationship.
PC magazine has reported that the 3DS has sold over 3 million, since March 2011 till today, November 11, 2011
It is impossible to say. Many countries do not keep such records nor are all such statistics publicly available.