Year Dollars 1992-01-01 495087 1997-01-01 428298 2004-01-01 2292803 2005-01-01 1200368 2010-01-01 6409867 2011-01-01 1099975 2012-01-01 1162379 2015-01-01 10663007 2016-01-01 8770515