Year Percent change 1980 4.839 1981 5.769 1982 2.202 1983 5.004 1984 1.011 1985 12.905 1986 -2.331 1987 4.437 1988 2.655 1989 -1.229 1990 2.537 1991 -1.245 1992 33.002 1993 10.461 1994 16.808 1995 26.51 1996 52.678 1997 147.973 1998 24.815 1999 26.395 2000 110.494 2001 60.023 2002 19.621 2003 14.455 2004 30.391 2005 8.21 2006 6.507 2007 15.282 2008 17.799 2009 1.343 2010 -8.924 2011 6.524 2012 8.313 2013 -4.133 2014 0.415 2015 -9.11 2016 -8.817 2017 -4.708 2018 -5.728 2019 -3.973 2020 -4.675 2021 -5.14 2022 -5.566 2023 -3.159 2024 1.475