Veganism is not always limited to diet, many won't wear leather shoes, etc.
Regarding the 14% stat if you include vegetarians that really is a different thing, since that is just diet. My wife has been vegetarian since she was 18, but wears leather shoes, eats honey, etc. Also, there are some cultures where vegetarian diet is almost the norm, e.g. 40% of India can be categorized as vegetarian.