Year annual % 1961 3.29247822413075 1962 3.25442429111116 1963 3.20370024514042 1964 3.15438306229724 1965 3.05491852691253 1966 3.0140006399367 1967 3.00976052542852 1968 2.92500534116226 1969 2.84453949157778 1970 2.78462745694684 1971 2.73207680212385 1972 2.68037059764019 1973 2.63971490754527 1974 2.59225188027832 1975 2.53599225030122 1976 2.49225534253544 1977 2.44825816277146 1978 2.40090342593952 1979 2.34553329448302 1980 2.28335057746082 1981 2.22401591253185 1982 2.18046569535891 1983 2.17459502251037 1984 2.1706147842773 1985 2.13701119963121 1986 2.10500688721 1987 2.08952314056645 1988 2.09200744715262 1989 2.11132015945943 1990 2.11178886670442 1991 2.07397993953864 1992 2.02564539348753 1993 1.98273369694004 1994 1.93286962108106 1995 1.87028571961207 1996 1.79529313183576 1997 1.704764411387 1998 1.60724463614751 1999 1.5485138848381 2000 1.52687888895349 2001 1.49044315561471 2002 1.4436803902991 2003 1.40844926048238 2004 1.37256671456504 2005 1.33615456062027 2006 1.29440166190212 2007 1.2633758696885 2008 1.27601221390825 2009 1.30524977858784 2010 1.31483782216629 2011 1.30068199219472 2012 1.27563736367599 2013 1.2499609813316 2014 1.2237834052777 2015 1.1960440040584 2016 1.16332018268349 2017 1.13014592909379 2018 1.10483767973875 2019 1.07497482890671 2020 1.07655224672892 2021 1.06892666709415 2022 0.992978304770296 2023 0.923257649090989