Year | Value | 2022 | 0.69057275801786 | 2021 | 0.7103276084387 | 2020 | 0.82044261300726 | 2019 | 0.90957254092075 | 2018 | 0.96547552024214 | 2017 | 1.0148894689678 | 2016 | 1.0461127782286 | 2015 | 1.0662351711072 | 2014 | 1.0872039098623 | 2013 | 1.1127679663798 | 2012 | 1.1482616854142 | 2011 | 1.1629639646046 | 2010 | 1.0829033148416 | 2009 | 1.1340418196938 | 2008 | 1.1585271056877 | 2007 | 1.1963141942857 | 2006 | 1.2341462986257 | 2005 | 1.2762504847875 | 2004 | 1.3059322654314 | 2003 | 1.3456567424144 | 2002 | 1.4045730944463 | 2001 | 1.4565399654075 | 2000 | 1.5098757203785 | 1999 | 1.5593638916703 | 1998 | 1.6056419460198 | 1997 | 1.6465268139639 | 1996 | 1.6890572334917 | 1995 | 1.7412141006553 | 1994 | 1.7811013085624 | 1993 | 1.8140313879769 | 1992 | 1.8531175481736 | 1991 | 1.9051221361074 | 1990 | 1.9261316430978 | 1989 | 1.9319011781869 | 1988 | 1.9660117569117 | 1987 | 1.994822864002 | 1986 | 2.0363188914909 | 1985 | 2.083746537281 | 1984 | 2.1321793260001 | 1983 | 2.16947430258 | 1982 | 2.1841762179259 | 1981 | 2.2396985950602 | 1980 | 2.3301680112198 | 1979 | 2.3843116320802 | 1978 | 2.4112735334415 | 1977 | 2.4031140710748 | 1976 | 2.3992639898937 | 1975 | 2.4269740931258 | 1974 | 2.4537651707731 | 1973 | 2.472805083658 | 1972 | 2.486928920596 | 1971 | 2.5070914929554 | 1970 | 2.5399739908 | 1969 | 2.5826909075557 | 1968 | 2.6299370578979 | 1967 | 2.6794936191336 | 1966 | 2.7318902972118 | 1965 | 2.7809921867552 | 1964 | 2.8103802390473 | 1963 | 2.8311958720167 | 1962 | 2.846096649708 | 1961 | 2.8513924017226 |
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