Year Percent change 1993 -89.003 1994 -17.525 1995 -14.149 1996 74.095 1997 5.834 1998 -10.715 1999 -6.223 2000 8.249 2001 19.079 2002 26.717 2003 20.008 2004 15.233 2005 24.977 2006 6.282 2007 4.895 2008 -4.03 2009 22.621 2010 25.583 2011 27.791 2012 29.998 2013 -11.92 2014 -10.813 2015 12.552 2016 8.262 2017 11.782 2018 4.47 2019 9.6 2020 10.34 2021 9.435 2022 7.118 2023 6.787 2024 5.239