Year Percent change 1991 6.293 1992 8.208 1993 4.002 1994 6.722 1995 5.669 1996 4.635 1997 5.231 1998 6.007 1999 3.776 2000 6.182 2001 3.804 2002 3.935 2003 3.747 2004 3.973 2005 5.592 2006 3.17 2007 3.338 2008 3.648 2009 3.866 2010 7.702 2011 -12.715 2012 2.393 2013 4.824 2014 -0.189 2015 -16.678 2016 -13.621 2017 -5.942 2018 -2.701 2019 2.057 2020 10.049 2021 8.501 2022 6.664 2023 6.683 2024 3.701