Year Percent change 1994 28.192 1995 20.709 1996 -3.915 1997 17.608 1998 14.729 1999 -6.635 2000 -14.381 2001 10 2002 8.817 2003 14.244 2004 18.276 2005 26.73 2006 14.867 2007 16.61 2008 -1.209 2009 -23.903 2010 34.852 2011 32.634 2012 2.726 2013 2.732 2014 1.94 2015 -1.344 2016 5.708 2017 2.402 2018 3.64 2019 2.5 2020 3 2021 3.332 2022 3.5 2023 3.594 2024 3.594