The city of Las Vegas has the most hotel rooms per city in the world. In America, one out of every two marriages ends in divorce. Babies that wear disposable diapers are five times more likely to get a diaper rash than babies wearing cotton diapers. It is estimated that 93 percent of American children will go trick-or-treating for Halloween. The total volume of mail that went through the Canadian postal system in 1950 was 1,362,310,155 items. In the United States, approximately 50 million people fish per year.