Year Percent change 1980 6.001 1981 10.346 1982 0.825 1983 1.144 1984 0.91 1985 0.689 1986 -1.379 1987 1.527 1988 1.406 1989 3.312 1990 3.819 1991 2.874 1992 1.79 1993 2.553 1994 2.877 1995 0.842 1996 1.999 1997 2.048 1998 -1.428 1999 0.678 2000 2.063 2001 -0.589 2002 0.437 2003 0.745 2004 1.311 2005 1.26 2006 0.808 2007 3.82 2008 5.366 2009 -0.527 2010 4.589 2011 5.535 2012 4.324 2013 1.499 2014 -0.076 2015 -0.64 2016 0.163 2017 0.375 2018 0.464 2019 1.445 2020 1.44 2021 1.348 2022 1.371 2023 1.419 2024 1.448