Year annual % 1961 15.728251454027967 1962 61.02437981180496 1963 23.9590942293645 1964 15.29436974339744 1965 17.990893039680326 1966 16.259746396786642 1967 15.496392643024082 1968 14.827849140712065 1969 18.503856566378914 1970 67.39153861074591 1971 24.184992532317043 1972 24.96889644590055 1973 18.967934624797778 1974 14.060865562978563 1975 16.964924401293707 1976 15.505282030641526 1977 13.725720905816122 1978 14.411743639127424 1979 11.152306456268978 1980 9.648167617903274 1981 11.774223926853072 1982 9.293882459271288 1983 8.487452082442728 1984 7.8669371161813215 1985 8.744637656279007 1986 9.182877377453636 1987 9.427566970478011 1988 9.081662441422756 1989 10.993185512382423 1990 6.852240785274205 1991 5.548686996808792 1992 3.290458985440875 1993 4.419345420953327 1994 4.18713198933369 1995 4.072829081165193 1996 3.803948848356795 1997 5.810078442676969 1998 3.1363906567903626 1999 2.8022420246441966 2000 1.3355646309312046 2001 -17.239387696316275 2002 0.9234470048189438 2003 0.5405041861937941 2004 0.6218809712461726 2005 0.2193375604283084 2006 -0.7136361176916635 2007 0.6758274850344866 2008 0.8581675742744482 2009 2.106388535941215 2010 1.8145602157595535 2011 2.91805565596565 2012 2.2089119807347126 2013 3.5248829211861588 2014 2.855782815955517 2015 2.992415379456152 2016 3.8573035616298297 2017 3.477614687916882 2018 2.33661337436651 2019 2.0824358273898227 2020 7.345062456752362 2021 2.947269435722168 2022 2.2042559511374247 2023 2.060748744906703