Year annual % 1961 2.90694148874684 1962 2.89816087523591 1963 2.90158374210772 1964 2.9024678783601 1965 2.91171375839247 1966 2.9136204024731 1967 2.90636583152877 1968 2.92005300009332 1969 2.94512852398383 1970 2.96776017311731 1971 3.00001932962891 1972 3.0403188498418 1973 3.02198537491372 1974 2.90560017146302 1975 2.98670006294429 1976 3.1429942349533 1977 3.13806752981631 1978 3.12536790901397 1979 3.11591490406642 1980 3.09817130454027 1981 3.06904995046808 1982 3.031585844239 1983 2.99618987111525 1984 2.95591495030146 1985 2.90840480945734 1986 2.87274054072188 1987 2.84181820707445 1988 2.80967440679007 1989 2.79764298849405 1990 2.80060965015231 1991 2.80313581156353 1992 2.80594685995967 1993 2.80543025160191 1994 2.80011388162174 1995 2.78931851535589 1996 2.77755908396057 1997 2.7650746444425 1998 2.64095706252099 1999 2.64099963918582 2000 2.73138300029784 2001 2.68473415634022 2002 2.62751491094002 2003 2.5592129363433 2004 2.48929432977264 2005 2.42460040894439 2006 2.35921073577649 2007 2.28811343765187 2008 2.21289893099486 2009 2.14336495538161 2010 2.07597795876773 2011 2.00986802562652 2012 1.95084289919704 2013 1.89595914681821 2014 1.84861910603263 2015 1.8093624065659 2016 1.77333693683233 2017 1.73985038012617 2018 1.7097289071087 2019 1.68069668453135 2020 1.622836376932 2021 1.5351396675707 2022 1.49211855882432 2023 1.53082951071852