Year Percent change 1980 7.115 1981 -1.618 1982 -3.463 1983 6.575 1984 10.972 1985 6.555 1986 -3.581 1987 3.51 1988 10.4 1989 10.262 1990 8.615 1991 5.988 1992 1.348 1993 -4.615 1994 10.391 1995 5.556 1996 3.386 1997 8.936 1998 7.261 1999 5.779 2000 11.354 2001 4.906 2002 -0.038 2003 3.782 2004 9.192 2005 5.02 2006 6.28 2007 7.117 2008 0.943 2009 -12.532 2010 14.337 2011 6.297 2012 -0.045 2013 -1.954 2014 2.147 2015 4.058 2016 3.2 2017 2.679 2018 8.503 2019 0.699 2020 1.9 2021 2.2 2022 2.46 2023 2.974 2024 1.71