Year Dollars 1992-01-01 1205420 1997-01-01 2649965 2006-01-01 1614587 2010-01-01 3801964 2011-01-01 2877379 2012-01-01 7049898 2013-01-01 8048134 2014-01-01 5004307 2015-01-01 5351702 2016-01-01 6796386