According to wikipedia[1] the population of the USA is 308,745,538 (2010 census). Is, even the majority of those, 1,900 Americans a really low figure to be a solid source for any argument?
If you'd like to know the answer to this question I suggest reading a statistics textbook. I think you'll be pleasantly surprised to hear that we can not only answer your question but put nice precise error bars on all our answers.
