Year | Value | 2022 | 0.95628779707663 | 2021 | 0.43567168405638 | 2020 | 0.41517673156556 | 2019 | 0.44467363900488 | 2018 | 0.487071924769 | 2017 | 0.69462110360498 | 2016 | 1.081396298728 | 2015 | 1.1209925023696 | 2014 | 0.78154163252584 | 2013 | 0.58938725469299 | 2012 | 0.45593747231891 | 2011 | 0.33708084183164 | 2010 | 0.24039429950077 | 2009 | 0.26195318990635 | 2008 | 0.31304143766151 | 2007 | 0.32414653528546 | 2006 | 0.49479777509847 | 2005 | 0.68126724829979 | 2004 | 0.62041312733418 | 2003 | 0.48713389482684 | 2002 | 0.49198046425522 | 2001 | 0.38279939448322 | 2000 | 0.24046665244652 | 1999 | 0.19456315326496 | 1998 | 0.10972836810098 | 1997 | 0.11331660832299 | 1996 | 0.13501983374879 | 1995 | 0.15310626070275 | 1994 | 0.3848695466783 | 1993 | 0.82462794099521 | 1992 | 1.1005522865282 | 1991 | 0.9984181031444 | 1990 | 0.76200161131611 | 1989 | 0.45051389973036 | 1988 | 0.14157085031854 | 1987 | 0.063284203908375 | 1986 | 0.063548997469243 | 1985 | 0.046950967908944 | 1984 | 0.0062949040920662 | 1983 | 0.16160098125392 | 1982 | 0.071717018034724 | 1981 | 0.25501823136898 | 1980 | 0.00010596827918243 | 1979 | 0.17046364802543 | 1978 | 0.080961041675265 | 1977 | 0.038390493901692 | 1976 | 0.17667228474711 | 1975 | 0.26531941073681 | 1974 | 0.17020576769728 | 1973 | 0.55404139895836 | 1972 | 0.58119035226519 | 1971 | 0.44624558137014 | 1970 | 0.34921894627692 | 1969 | 0.34533164624452 | 1968 | 0.5192542615792 | 1967 | 0.74742522011707 | 1966 | 0.70139611623527 | 1965 | 0.64972987557674 | 1964 | 0.66654820529122 | 1963 | 0.64236267065208 | 1962 | 0.61289584782287 | 1961 | 0.54847235641775 |
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