In 2008, a 'Vegetarianism in America' study reported that there were 7.3 million adult vegetarians in the Us. This comprises 3.2 percent of the population at the time. In the world, about 50% of the entire population is vegan. However, not everyone does it by choice. "Most of the vegetarians in the world are vegetarian because of their economic situation. In India about 30% are lacto vegetarian because of their religious beliefs."