Brahmins, Jains, Agarwals, Baiays and Vaisnav followers are vegetarian.The number of vegetarians is increasing by 10% every year.A difficult one to answer. 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. In the west about 3% are some kind of vegetarian due to choice. Over half of the worlds population is vegetarian.