| Year | Value | | 2022 | 380.31822898651 | | 2021 | 316.44759598755 | | 2020 | 289.35489450017 | | 2019 | 281.65859564165 | | 2018 | 261.06883431339 | | 2017 | 235.29920442753 | | 2016 | 205.61224489796 | | 2015 | 180.49982704946 | | 2014 | 121.38533379454 | | 2013 | 108.31027326185 | | 2012 | 108.56969906607 | | 2011 | 107.95572466275 | | 2010 | 100 | | 2009 | 91.430300933933 | | 2008 | 78.900034590107 | | 2007 | 63.005880318229 | | 2006 | 55.83708059495 | | 2005 | 51.202006226219 | | 2004 | 45.084262712128 | | 2003 | 41.343476869116 | | 2002 | 39.307476241019 | | 2001 | 39.011991286423 | | 2000 | 34.844950384424 | | 1999 | 27.179491864775 | | 1998 | 22.154123254253 | | 1997 | 20.034990068655 | | 1996 | 17.280392002246 | | 1995 | 9.5828886445887 | | 1994 | 2.0100609405514 | | 1993 | 0.20279315844411 | | 1992 | 0.0041943485214219 |
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