Year annual % 1961 1.6879119194383834 1962 1.8340624255837827 1963 1.8796153181702555 1964 1.8894738311649641 1965 1.928746414827643 1966 1.9419872247118657 1967 1.9437921197199823 1968 1.968604992680512 1969 1.9917212352958225 1970 2.0701565679152734 1971 2.140965432984303 1972 2.307162919558047 1973 2.4987805233104963 1974 2.5829619675468805 1975 2.6728911851332775 1976 2.7180269367274588 1977 2.8797617892401326 1978 3.0580224607574333 1979 2.998006671657117 1980 1.9738953620916933 1981 0.93079378592162 1982 1.0728515181884046 1983 0.942972105162603 1984 0.8214152444829087 1985 0.6191593606228873 1986 0.29674988428657545 1987 -1.170995305332022 1988 -1.7647500338159607 1989 -0.8008915278203756 1990 -0.28557262147299767 1991 1.267233996551691 1992 1.2041896451684353 1993 2.1026968061697144 1994 4.1649993224307575 1995 3.769156781653185 1996 2.34390971272422 1997 1.9849907839663556 1998 2.1108299812680977 1999 2.1708192970999955 2000 2.2025688653631836 2001 2.260391158268627 2002 2.3145662770903814 2003 2.3412031536766067 2004 2.3539069055478268 2005 2.331539311393569 2006 2.3020129253214656 2007 2.331112979780777 2008 1.9463114403632877 2009 1.9501206636607347 2010 2.0661259761116635 2011 2.18764524942692 2012 2.258031040666526 2013 2.3043945297327975 2014 2.288584212568158 2015 2.250434304345343 2016 2.3240972327516314 2017 2.286943104251629 2018 2.1176777102188376 2019 2.0393959310013656 2020 2.0408774945037993 2021 1.9578113336225273 2022 1.8439181688873738 2023 1.8554679360422952