Year Percent 2000-01-01 1.37651975 2001-01-01 1.07370115 2002-01-01 1.46174875 2003-01-01 2.07517625 2004-01-01 2.54918875 2005-01-01 2.60850450 2006-01-01 2.08074125 2007-01-01 1.66201700 2008-01-01 1.51437075 2009-01-01 2.01452950 2010-01-01 2.57009625 2011-01-01 2.59215650 2012-01-01 3.10747275 2013-01-01 4.13652300