Year annual % 1961 1.87395824158882 1962 1.85862602878222 1963 1.78071521729739 1964 1.78133048714446 1965 1.84167146101964 1966 1.82219703063325 1967 1.81589422997423 1968 1.81725188491331 1969 1.81410293227949 1970 1.8145562237628 1971 1.81245292570845 1972 1.80250505211295 1973 1.78878666376347 1974 1.80405524090265 1975 1.84950697024896 1976 1.89012926007231 1977 1.92464453587509 1978 1.95012101394867 1979 1.96550085766307 1980 1.97184290911044 1981 1.990462206484 1982 2.01911312575433 1983 2.02197581058211 1984 2.01684204761959 1985 2.03164635489726 1986 2.05318577146398 1987 2.06865076100303 1988 2.07727078684654 1989 2.07321084258131 1990 2.05952182457413 1991 2.01164838947874 1992 1.95811490862095 1993 1.92642979077471 1994 1.88989857791315 1995 1.86892486465026 1996 1.861046656428 1997 1.84349433438618 1998 1.82432926055518 1999 1.81992095136481 2000 1.82614145032597 2001 1.79596365914658 2002 1.744825137965 2003 1.72490029683628 2004 1.67941646661672 2005 1.66448553299086 2006 1.68016163386105 2007 1.65399026348443 2008 1.62585605595915 2009 1.6098133370454 2010 1.1468886718608 2011 1.12574729606877 2012 1.53746880756048 2013 1.49898644905428 2014 1.46596797524852 2015 1.43989350727897 2016 1.41082121304761 2017 1.38753007437198 2018 1.36113131762731 2019 1.33513859245585 2020 1.30291995864045 2021 1.23729899666313 2022 1.19334195623455 2023 1.19922882982183