The prevalence of obesity increased significantly from 1993 to 2004 from 13.6% to 24.0% among men and from 16.9% to 24.4% among women. If obesity prevalence continues to increase at the same rate, it is projected that the prevalence of obesity in 2012 will be 32.1% in men and 31.0% in women. The projected 2012 prevalence for adults in manual social classes is higher (43%) than for adults in non-manual social classes (35%).