Year Percent change 1990 10.1 1991 -30.175 1992 0.233 1993 -7.377 1994 -13.923 1995 -11.771 1996 -5.296 1997 -1.322 1998 6.323 1999 -7.677 2000 3.548 2001 -7.496 2002 -1.303 2003 18.344 2004 5.991 2005 12.156 2006 20.938 2007 15.694 2008 8.079 2009 -19.071 2010 -17.986 2011 30.176 2012 18.99 2013 6.645 2014 8.701 2015 28.668 2016 -34.393 2017 7.797 2018 5.463 2019 6.156 2020 5.511 2021 5.3 2022 5.444 2023 5.476 2024 -5.527