Year annual % 1961 3.6464612869913964 1962 0.15994817787643 1963 -1.1492660535914183 1964 4.48844647759492 1965 3.165882653295398 1966 4.6006583101315215 1967 7.939641765796864 1968 0.46928856814669473 1969 2.3355714066648545 1970 3.708353022223207 1971 5.87049050521766 1972 6.774575140906961 1973 15.301473539205702 1974 26.0737017850942 1975 21.098098910300166 1976 11.502459895853903 1977 10.50666589397116 1978 8.982345695884234 1979 6.5334000719587095 1980 9.00820936080487 1981 10.0773395761492 1982 9.371647737004011 1983 5.27408362910478 1984 9.653554452375317 1985 4.534942787126312 1986 3.292000837204668 1987 4.518205777736384 1988 9.617560649784096 1989 8.585048017188313 1990 6.451999167913684 1991 13.492416253721345 1992 10.20140776260186 1993 8.83855312769657 1994 13.028416049046186 1995 13.006484467507391 1996 8.373609994594688 1997 13.383514638671315 1998 7.5260368956337516 1999 5.8622861838065035 2000 68.0104449967103 2001 6.012792433817381 2002 3.921378570656884 2003 3.5526580799610628 2004 7.251342984163216 2005 5.5560817680806736 2006 5.997638176704072 2007 10.33132459167281 2008 10.920467272077516 2009 12.374626293127136 2010 10.588644262424495 2011 16.410956267514436 2012 9.918315437763965 2013 7.383106967384975 2014 7.209765439260792 2015 4.441980334385036 2016 0.9221633262620088 2017 4.029745993255787 2018 3.8417866327479686 2019 9.03633484170507 2020 9.944498210572903 2021 10.267342080669437 2022 13.917398023894975 2023 26.160340209646392