Year Dollars 1997-01-01 223952 2003-01-01 1759758 2004-01-01 1918814 2005-01-01 4369981 2006-01-01 9281355 2010-01-01 9840502 2011-01-01 14546981 2012-01-01 15501637 2013-01-01 21667303 2014-01-01 25557496