Year Percent 1995-01-01 32.661000000000000 1996-01-01 30.854700000000000 1997-01-01 23.573300000000000 1998-01-01 22.126700000000000 1999-01-01 17.326500000000000 2000-01-01 21.445800000000000 2001-01-01 16.480200000000000 2002-01-01 13.588900000000000 2003-01-01 10.057800000000000 2004-01-01 10.576200000000000 2005-01-01 11.231200000000000 2006-01-01 9.856489999999999 2007-01-01 13.953700000000000 2008-01-01 7.993580000000001 2009-01-01 5.311310000000000 2010-01-01 5.015640000000000 2011-01-01 5.251350000000000 2012-01-01 6.043450000000000 2013-01-01 5.095890000000000 2014-01-01 6.743670000000000 2015-01-01 6.593389999999999 2016-01-01 6.471500000000000