Year Percent change 1983 3.792 1984 0.88 1985 1.494 1986 2.32 1987 1.351 1988 1.904 1989 3.643 1990 2.974 1991 2.026 1992 0.83 1993 0.945 1994 1.358 1995 -0.78 1996 -0.148 1997 2.256 1998 4.524 1999 6.3 2000 6.145 2001 3.016 2002 1.752 2003 3.605 2004 1.802 2005 -1.555 2006 0.214 2007 16.748 2008 63.252 2009 -2.538 2010 0.386 2011 5.512 2012 5.797 2013 3.419 2014 0.524 2015 3.163 2016 -0.215 2017 3.48 2018 3.382 2019 3.869 2020 3.247 2021 3.092 2022 2.99 2023 2.99 2024 2.99