Nearly one in five children in the United States are overweight. Ogden et al., studied 3,958 children and adolescents between the ages of 2–19 from 2003–2004. The study was a part of the NHANES which is the National Health and Nutrition Examination Survey. It showed that 17.1% of the 3,958 children were overweight, with over 35% percent of children ages 6–19 being seriously overweight. Ogden et al., had results showing 37.4% of this group was considered to be seriously overweight. Another age range where there are a high percentage of children who are overweight, are the range from 6–11. Ogden et al., was a study which was conducted in 2003–2004. The data collected was arranged into different age ranges. It showed that 18.8% of children ages 6–11 are overweight. Research has shown that obesity in children has increased from 1999 to 2004. The 1999 study showed that 28.2% of children from the ages of 2–19 were overweight. In the 2004 study, that amount was 33.6%. The age range that was the most affected was children from the ages of 6–11, for which the percentage rose 7.4 points from 29.8% to 37.2%.