Year | Value | 2021 | 176.98994760967 | 2020 | 172.37697674419 | 2019 | 185.34662698413 | 2018 | 175.19935361217 | 2017 | 185.52800813008 | 2016 | 188.15094569057 | 2015 | 191.00917439287 | 2014 | 190.42541977413 | 2013 | 181.82741265458 | 2012 | 179.91927698739 | 2011 | 173.63000305443 | 2010 | 166.54064372699 | 2009 | 173.75598390471 | 2008 | 170.30430981677 | 2007 | 168.40731350438 | 2006 | 175.77312967922 | 1992 | 127.12461538461 | 1991 | 132.31639344262 | 1990 | 145.75272727273 | 1989 | 123.98928571429 | 1988 | 117.60877192982 | 1987 | 130.10196078431 | 1986 | 132.03404255319 | 1985 | 122.25217391304 | 1984 | 108.76875 | 1983 | 133.32142857143 | 1982 | 134.1425 | 1981 | 133.75263157895 | 1980 | 122.58378378378 | 1979 | 101.24055812002 | 1978 | 91.298734177215 | 1977 | 82.399908422288 | 1976 | 79.301426872771 | 1975 | 60.213418257005 | 1974 | 54.401205809811 | 1973 | 86.700260955638 | 1972 | 95.301037186947 |
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