Year annual % 1961 -6.68086980149134 1962 13.061602103594169 1963 -8.651276578749062 1964 -20.66162261552435 1965 3.4943678142725645 1966 6.664839247008203 1967 5.9603192094690485 1968 5.623807681672673 1969 9.688753307305959 1970 -0.3458352772111084 1971 -2.6058617780511497 1972 -7.7242148003664255 1973 -5.592860765705709 1974 1.0758152487112795 1975 -13.317014370283033 1976 14.084905838921614 1977 2.01392382260552 1978 9.496897708793071 1979 13.303081848013804 1980 4.712903715333667 1981 -1.9685767424599874 1982 -6.402807423798862 1983 10.705013416907889 1984 -16.247662049238826 1985 -5.536725560607508 1986 8.582992515507442 1987 -8.40950208594981 1988 6.974502457988592 1989 -2.069524005706171 1990 -3.5991237691839757 1991 8.777530406901988 1992 -1.021672990828165 1993 -7.8350050739282295 1994 -7.922686517573169 1995 20.28300326247316 1996 -8.685890825243519 1997 -3.7696039797167202 1998 10.206841270685544 1999 14.724758024028588 2000 10.426763692098831 2001 2.97688829041833 2002 11.592615660783196 2003 -6.614772846320477 2004 4.023499252487255 2005 5.8874227187524895 2006 7.3129224218305495 2007 -0.1269573056768536 2008 5.030404249788489 2009 7.002763459108579 2010 2.853492220598099 2011 6.218996550853802 2012 4.003256532288546 2013 1.7299136636488583 2014 3.9069183479978165 2015 9.364131871239294 2016 1.7006238956895743 2017 -3.341465254917793 2018 7.015577714902534 2019 -0.3990314219601885 2020 -1.126483430789179 2021 3.50745671257215 2022 9.525494916558188 2023 6.553007918922276