I'm sure my country will be in the top 20 on the list if it's extended, except if offline gambling isn't counted as part of the stats. The rate at which lotto kiosks and centres spring up in my country is really alarming and it goes to show how addicted youths are becoming to gambling. As for the US topping the list, I ain't surprised. The US is a country that doesn't restrict stuff which keeps citizens busy and entertained, provided those who run them remit taxes to government.