Year Percent 2000-01-01 1.193766 2001-01-01 1.218916 2002-01-01 1.559142 2003-01-01 2.010670 2004-01-01 1.619893 2005-01-01 1.727879 2006-01-01 2.506638 2007-01-01 3.258395 2008-01-01 3.205031 2009-01-01 4.620958 2010-01-01 5.034453