Year annual % 1976 5.0454463917384516 1977 3.3157612515148713 1978 7.093443689506103 1979 6.913174318166298 1980 -2.9277807851328106 1981 -6.307572209006125 1982 -8.542692057764896 1983 -9.986143262117892 1984 3.5307649199432376 1985 13.173006180848446 1986 3.2483262546289637 1987 -3.181190451994823 1988 5.441236270752654 1989 21.273988637057002 1990 18.76609347890185 1991 6.8490080328084275 1992 -4.069304790282075 1993 -5.125967205503827 1994 -0.4584768054985915 1995 13.903656873959534 1996 2.8588187758133046 1997 10.845642280370214 1998 -0.15423682985989728 1999 -2.0814044191884022 2000 -3.324333749839454 2001 -6.357208550841008 2002 3.0121129883536923 2003 -0.42818742845463476 2004 1.2892885243959142 2005 8.80191564501844 2006 15.065855185198984 2007 6.729197740250953 2008 9.188073919000232 2009 2.9183738891261015 2010 5.183850804649495 2011 3.074822246349072 2012 6.389473500668501 2013 6.088045488473952 2014 0.1268794557181394 2015 1.5515144301149917 2016 0.5109119413025667 2017 -0.6499388260623107 2018 3.2345099359504843 2019 1.1503381101409644 2020 0.4583685509231117 2021 0.8360547471395279 2022 1.4143050950022058 2023 5.33915579601927