Year annual % 1961 0.21246210329830717 1962 4.51697975882783 1963 2.955562197474862 1964 3.265326056884831 1965 1.8591513315108017 1966 -2.3976804030799883 1967 8.700353179424255 1968 5.80988588925733 1969 0.9257066816794008 1970 13.30559042372687 1971 13.880268577404834 1972 9.243589216727273 1973 8.425157433220562 1974 3.6661897523340343 1975 14.62590690901149 1976 21.491870235223274 1977 16.614100882300903 1978 12.981536747641712 1979 14.225313767694558 1980 14.904410679845554 1981 16.347302411243277 1982 12.085410429016918 1983 7.7254932590189895 1984 7.798791397584807 1985 13.634213190300159 1986 16.948335307547183 1987 11.47014820505305 1988 7.90848888018445 1989 5.639550995091994 1990 2.423602980811083 1991 0.8902598393832051 1992 2.001485484170388 1993 1.4792160754386856 1994 1.907314948523549 1995 1.4306131452947852 1996 1.3940701311839376 1997 1.5619275338703034 1998 1.050519163532428 1999 0.5863747120450284 2000 2.88433930020895 2001 3.8609157203679985 2002 0.29805633290339983 2003 2.0684172410782082 2004 2.758721899712441 2005 2.000268450948809 2006 2.7098343423932647 2007 5.31623899608735 2008 2.7375251665345104 2009 2.640887651372111 2010 3.159592780163493 2011 2.4677345011340606 2012 -0.18964168142568383 2013 4.161024819739495 2014 0.48110943897887637 2015 1.4440385003646554 2016 2.410432574319941 2017 3.616932543945822 2018 1.7531271050092982 2019 3.085566309500962 2020 1.9551516537865723 2021 4.578162455176809 2022 5.587087558770108 2023 5.400263733192958