Figures show that obesity rates for preschoolers have fallen dramatically over the last 10 years. According to Medical News Today, CDC statistics show a 43 percent drop in obesity among youngsters 2 to 5 years old. Overall U.S. obesity rates remained at the same level, and they actually went up significantly in women at least 60. The CDC says that unlike the specific role BMI measurements play in determining an adult’s weight status, a child’s weight category is the result of considering age- and sex-specific BMI percentiles.