Year annual % 1961 2.272881701815834 1962 4.346874725841744 1963 4.765302677719845 1964 3.6294768627301153 1965 4.941495204223074 1966 7.834250800709384 1967 5.4553823471277525 1968 5.026373478883016 1969 3.5483320973302312 1970 8.282373932897144 1971 1.99921191269803 1972 1.4495970398157283 1973 7.2909500171903545 1974 1.7750659148194217 1975 2.3851525798472437 1976 6.7852302218658735 1977 7.377911679840992 1978 7.87134177911058 1979 3.127380698611333 1980 2.925416257511145 1981 3.6640890456357056 1982 3.2032468313280873 1983 3.479430666343063 1984 3.6940014506821086 1985 2.665329515992781 1986 3.594504403609065 1987 7.563336604898836 1988 11.311739893124368 1989 10.304888214483725 1990 9.346719046133884 1991 6.871916891570066 1992 6.490478354884715 1993 6.683558177872385 1994 6.460397343873851 1995 6.637786546397223 1996 4.272296614722464 1997 -3.994106257284116 1998 -8.765114592337198 1999 3.404319497675928 2000 3.4218148113462945 2001 2.4962836531893515 2002 5.202479885116617 2003 6.271893251555298 2004 5.419952834050676 2005 3.3800600378687022 2006 4.179335861717973 2007 4.634876900012898 2008 0.9680091653326599 2009 -1.4014819110335992 2010 6.793959919427465 2011 0.1909472376481176 2012 6.554004501777385 2013 2.0653087062169675 2014 0.4325823230136905 2015 2.6448125154944364 2016 2.9771584992430036 2017 3.7498437436775873 2018 3.886439660544937 2019 1.8568489976548364 2020 -6.270733060329988 2021 1.3902430096211589 2022 2.325679337270145 2023 1.7348927720589415