Year Percent 2006-01-01 7.260960000000001 2007-01-01 9.294520000000000 2008-01-01 5.275869999999999 2009-01-01 5.133900000000000 2010-01-01 1.067790000000000 2011-01-01 1.366750000000000 2012-01-01 1.419650000000000