U.S. gamers spent $3.8 billion on massively multiplayer online games in 2009, almost 15 times more than other substantial MMO markets in Europe, according to a new study.Consumer data from Today's Gamers MMO Focus Report by Gamesindustry.com and TNS indicates that the number of MMO players in the U.S. has reached 46 million, 46 percent (21 million) of which paid to play online games; the rest, around 25 million gamers, play MMOs without spending any money. The average paying MMO player spent around $15.10 per month on their games.The report points out that Blizzard'shas the most number of players in the U.S. out of all the MMOs it tracked, just in front ofand. Other MMOs in the top five includeandThe study also breaks down the $3.8 billion total spent on MMOs in 2009: 47 percent ($1.8 billion) was spent on monthly subscriptions, 15 percent ($580 million) on annual subscriptions, 19 percent ($740 million) on virtual currency, 8 percent ($280 million) on direct microtransactions, and 11 percent ($400 million) on the initial boxed product or client download.Consumers in the UK, which has the second highest total measured by the report, spent only $270 million on MMOs in 2009. However, the country's total had the highest percentage of revenues from direct microtransactions, 19 percent ($51 million).Germany ($250 million total), France ($220 million), and the Netherlands ($65 million) had the biggest 2009 revenue percentages from virtual currency, each pulling in at least 26 percent from that source. Belgium's ($55 million) revenues had the highest percentages for monthly and annual subscriptions, at 53 percent and 20 percent respectively.Today's Gamers MMO Focus Report adds that it expects growth in MMO revenues from countries such as Italy, Spain, Russia, Turkey, Poland and Sweden.