Year annual % 1961 1.8647951656276547 1962 15.331814327258101 1963 10.615069994894498 1964 8.251118123612741 1965 2.1541055684123194 1966 -0.40552138784264 1967 10.912061516872896 1968 -0.3671200385537787 1969 1.5475366910076929 1970 2.177071168556296 1971 5.113717713365773 1972 -0.20270834665791426 1973 26.404881061347353 1974 10.980088950599878 1975 -13.513497558147861 1976 11.04912916156617 1977 21.809034965751124 1978 18.316874889719898 1979 2.8939187784275333 1980 -2.7447792399755855 1981 0.6946381440427842 1982 4.457203889570536 1983 1.986165353389623 1984 5.534897826181549 1985 2.6102493302488483 1986 4.684856036877164 1987 0.7297282197768169 1988 8.601919078508274 1989 5.795244407692479 1990 6.045473329434415 1991 6.966607296520436 1992 6.956364954002538 1993 3.5097661576011063 1994 5.979873535363865 1995 3.290938122728221 1996 5.59703605867827 1997 3.7036034360743173 1998 1.5376558943374334 1999 0.4760250522011944 2000 3.875546775766935 2001 3.5615818339209255 2002 0.7238360671671273 2003 4.559777163845283 2004 1.6923741735859608 2005 3.4661222275531145 2006 4.230095228052093 2007 4.187914099571515 2008 5.523419669786463 2009 -1.2537577992083158 2010 5.269670780562862 2011 4.616413945287519 2012 6.334083746794477 2013 1.7925255557554465 2014 1.710549905454755 2015 3.1240667804454603 2016 3.6089073168771364 2017 -3.1381749373347105 2018 -1.480633158482405 2019 -1.4179938308520548 2020 -7.458717059462899 2021 1.852678521078417 2022 1.285504124588968 2023 0.8981497777987357