Year Percent change 1980 4.022 1981 6.486 1982 5.671 1983 2.95 1984 2.937 1985 3.427 1986 0.743 1987 1.435 1988 1.872 1989 3.154 1990 5.404 1991 5.859 1992 4.037 1993 3.293 1994 0.851 1995 1.797 1996 0.81 1997 0.519 1998 0.019 1999 0.808 2000 1.561 2001 0.991 2002 0.641 2003 0.636 2004 0.801 2005 1.173 2006 1.064 2007 0.735 2008 2.428 2009 -0.48 2010 0.688 2011 0.228 2012 -0.693 2013 -0.216 2014 -0.012 2015 -1.142 2016 -0.434 2017 0.534 2018 0.934 2019 0.835 2020 0.9 2021 1.044 2022 0.967 2023 1.021 2024 1