Year annual % 1961 1.61302935871282 1962 1.62928187313431 1963 1.62166139329755 1964 1.59952318668413 1965 1.57753297819568 1966 1.57214364722082 1967 1.56733492428668 1968 1.55205695164038 1969 1.54154392219959 1970 1.56729964784306 1971 1.58358304042331 1972 1.59481478504434 1973 1.64326169179334 1974 1.70070709763708 1975 1.65927396323707 1976 1.58995977036791 1977 1.59811228647283 1978 1.60546261056525 1979 1.60065891136555 1980 1.5849187137401 1981 1.58060960059338 1982 1.57328620697584 1983 1.55878211832102 1984 1.53715277473885 1985 1.51340289933673 1986 1.51132782511058 1987 1.51097418180074 1988 1.50808699373212 1989 1.48765537832153 1990 1.45640251463185 1991 1.42406315580335 1992 1.38743464174592 1993 1.35796579095645 1994 1.34702378575008 1995 1.31755424518083 1996 1.26041058779251 1997 1.19826447409119 1998 1.15817763601349 1999 1.15204385364535 2000 1.13327702210541 2001 1.0991714603689 2002 1.07353834961783 2003 1.03236085902218 2004 1.01533668354561 2005 1.03347622351885 2006 1.03467173566483 2007 1.00629733064648 2008 0.992294094354656 2009 1.01428389337816 2010 0.255582398485167 2011 1.15305928006386 2012 1.13690569378967 2013 1.11910919999772 2014 1.09946109101836 2015 1.07800134449604 2016 1.05718157762752 2017 1.03713389686514 2018 1.01580834908002 2019 0.993397493293046 2020 0.970053991438048 2021 0.947490959333989 2022 0.925835473662058 2023 0.903771167435598