The 3% (approx.) figure for the US and the world is from a modest study around '07 or so. Current studies show that the world percentage is about 5%.

If people only knew the truth... They think they do, but they don't. If they knew that pigs are often boiled alive...that chickens and turkeys have their beaks and feet amputated...that cows... Well, point is, people hide their heads in the sand and refuse to really examine the truths in their lives regarding other sentient beings.