Because they are referring to the person's diet. Many vegetarians call people who eat meat non-vegetarians while they usually call themselves omnivorous.
It is about a fair split. While some will remain partial vegetarians, many will ultimatel bdome full-fledged vegetarians or even vegan after many years.
Yes, absolutely! In fact, many vegetarians probably prefer organic foods.
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About 40% of the population.
4%
166,500 - 3.7%
< 386,000 < 1%
30,000 - 0.3%
Some are, but many are not.
A few about 20 %
204,000 - 2%