There were, on average, 16.4 such shootings a year from 2007 to 2013, compared with an average of 6.4 shootings annually from 2000 to 2006. In the past 13 years, 486 people have been killed in such shootings, with 366 of the deaths in the past seven years.In all, the study looked at 160 shootings since 2000.here were, on average, 16.4 such shootings a year from 2007 to 2013, compared with an average of 6.4 shootings annually from 2000 to 2006. In the past 13 years, 486 people have been killed in such shootings, with 366 of the deaths in the past seven years.
Confidence votes 22. The main issue between the US and Mexico was the American Southwest and whom it should belong to. Mexico had held this land since their separation from the Spanish Empire, and the US wanted to buy it for $30 million, but Mexico staunchly refused to sell.
A minority believes the war arose simply out of Mexico's failure to pay claims for losses sustained by U.S. citizens during the Mexican War of Independence. Mexican Politics. At the time of the war, Mexico had a highly unstable government.