Overweight figures are based on self-reported height and weight.
Overweight is measured by the Body Mass Index (BMI). BMI is the quotient of body weight in kilograms and the square of height in metres [kg/m2]. Adults are overweight at a BMI of 25 or higher. A BMI between 25 and 30 is moderately overweight, and a BMI of 30 or higher is severely overweight (obese).