Year annual % 1961 -2.8432241087020316 1962 17.61973301655108 1963 5.891446842857675 1964 4.5497953462259915 1965 -17.437183362912222 1966 15.69636040982428 1967 1.0501868180651002 1968 -1.651476653555477 1969 4.212287084374935 1970 14.42302265345279 1971 1.8563344067304257 1972 1.692373536225773 1973 7.6940674518696 1974 4.205669269920136 1975 3.8288887265743625 1976 2.789343288891885 1977 3.1545485754183886 1978 -2.5138856014819027 1979 -4.600754996501337 1980 17.367884001870436 1981 -2.1692040309755214 1982 2.039554445266731 1983 0.5106230548879154 1984 0.17813545951219112 1985 -3.805440859689 1986 2.081757073830161 1987 9.756795881834094 1988 5.394095498293794 1989 3.021722681440693 1990 -10.987157187408073 1991 0.7878530663146392 1992 10.857291769920835 1993 2.1612813364305055 1994 -1.8983097293748017 1995 4.129111007087616 1996 1.7439205257071535 1997 6.144045302573687 1998 1.4463547973388131 1999 4.2433283373338355 2000 1.7793954998170278 2001 0.035145783013874166 2002 2.253611968765597 2003 -3.974841005478936 2004 1.3187774128212482 2005 11.106105111534575 2006 7.6699489137267705 2007 4.4728036916541924 2008 4.105659543751926 2009 4.225218318995047 2010 5.476907746691367 2011 2.982688956578116 2012 0.6079386275735175 2013 0.9532270474041269 2014 4.025993169996255 2015 5.171040085670015 2016 4.809242017022882 2017 3.1773906667673373 2018 4.518375316698339 2019 3.506574323540562 2020 -4.409292997776632 2021 5.465357294594369 2022 4.074702701786848 2023 1.5783249092876588