Year Dollars 1992-01-01 1734656 1997-01-01 711874 2002-01-01 2357233 2003-01-01 1974838 2004-01-01 3007468 2005-01-01 3418877 2006-01-01 6163982 2007-01-01 3428256 2008-01-01 5678915 2009-01-01 3752553 2010-01-01 6056859 2011-01-01 2342066