In Canada, the prevalence rate of SAD is between 2 and 3 percent. In the United States, however, the rate is less than 1 percent. European community-based studies have estimated the prevalence of SAD to be between 1.3 and 3 percent of the European population, whereas studies in Asia report rates of 0 to 0.9 percent of their population.
they do tend to make people look healthier (unless you go too much)
...just enjoying every min of sunshine that you get in a day...