Year annual % 1961 -3.4983125528591046 1962 -0.20570786374098304 1963 7.537205132156515 1964 0.47585756245224786 1965 2.267202857568691 1966 0.33790087338276464 1967 1.7168594456950217 1968 0.23964894128474157 1969 2.191540492768638 1970 3.6328604821363797 1971 4.174688080223092 1972 4.076862975719848 1973 1.1431844258844848 1974 9.366978428606302 1975 10.127651582104917 1976 2.921994704684238 1977 3.3155616820242955 1978 -1.015491514552025 1979 -1.5894222394701103 1980 1.104818220016952 1981 -0.6686445657742723 1982 0.04438883987725717 1983 5.916225843109203 1984 0.96468936498799 1985 2.370123388848185 1986 -5.015381289131298 1987 -2.2177641209572982 1988 0.1790747543243043 1989 -0.9358124022795664 1990 3.7288558141908084 1991 3.3172531235176876 1992 3.6113246179420173 1993 1.204776388142207 1994 -3.3106707363098593 1995 -0.9983440012872506 1996 3.207619486700608 1997 1.0360652753142148 1998 3.095307539767674 1999 -0.9221832659225555 2000 2.4089496338896197 2001 2.243282268411889 2002 3.60357955400022 2003 1.5977553340683386 2004 3.5938840273094286 2005 3.9624910127647865 2006 3.015261711283017 2007 7.159869699007373 2008 1.4091757326680323 2009 4.464814443374195 2010 3.2545308170207363 2011 0.7430623047586238 2012 2.772771800173345 2013 -1.491060534229021 2014 0.19929316317445966 2015 -2.688786062756648 2016 1.5259007823718918 2017 -0.27831996028406536 2018 -1.861443927791882 2019 -0.792306013476761 2020 -2.9811240425574397 2021 4.221412146269742 2022 2.426251231658668 2023 0.8152027246672588