From 1820 to 2010 the population of New York City increased almost 5 people PER HOUR. <a href="http://www.wolframalpha.com/input/?i=%28population+of+new+york+city+in+2010+-+population+of+new+york+city+in+1820%29+%2F+number+of+hours+between+1820+and+2010">http://www.wolframalpha.com/input/?i=%28population+of+new+york+city+in+2010+-+population+of+new+york+city+in+1820%29+%2F+number+of+hours+between+1820+and+2010</a> (PS I love wolfram alpha)