Year Percent 2003-01-01 6.460630000000000 2004-01-01 9.192739999999999 2005-01-01 18.400200000000000 2006-01-01 37.390800000000000 2007-01-01 58.327300000000000 2008-01-01 48.577000000000000 2009-01-01 32.241000000000000 2010-01-01 3.906650000000000 2011-01-01 9.339500000000000 2012-01-01 17.733900000000000