Year | Value | 2022 | 143 | 2021 | 131 | 2020 | 118 | 2019 | 110 | 2018 | 109 | 2017 | 112 | 2016 | 119 | 2015 | 127 | 2014 | 134 | 2013 | 138 | 2012 | 140 | 2011 | 137 | 2010 | 133 | 2009 | 127 | 2008 | 124 | 2007 | 123 | 2006 | 124 | 2005 | 122 | 2004 | 119 | 2003 | 114 | 2002 | 110 | 2001 | 108 | 2000 | 106 | 1999 | 107 | 1998 | 107 | 1997 | 110 | 1996 | 115 | 1995 | 117 | 1994 | 116 | 1993 | 115 | 1992 | 116 | 1991 | 115 | 1990 | 115 | 1989 | 114 | 1988 | 111 | 1987 | 109 | 1986 | 106 | 1985 | 99 | 1984 | 95 | 1983 | 92 | 1982 | 88 | 1981 | 86 | 1980 | 85 | 1979 | 84 | 1978 | 88 | 1977 | 97 | 1976 | 107 | 1975 | 116 | 1974 | 129 | 1973 | 144 | 1972 | 157 | 1971 | 163 | 1970 | 166 | 1969 | 167 | 1968 | 158 | 1967 | 144 | 1966 | 133 | 1965 | 129 | 1964 | 130 | 1963 | 132 | 1962 | 133 | 1961 | 135 | 1960 | 136 |
|