Year | Value | 2021 | 432.30358712057 | 2020 | 393.38216230019 | 2019 | 436.52598161434 | 2018 | 436.18907795063 | 2017 | 415.64587337488 | 2016 | 370.8529757462 | 2015 | 363.27558134762 | 2014 | 419.85342432648 | 2013 | 421.94309512341 | 2012 | 397.80601352015 | 2011 | 420.07473146185 | 2010 | 371.86178578486 | 2009 | 367.35813628609 | 2008 | 444.14564314712 | 2007 | 362.16111949168 | 2006 | 279.65881688645 | 2005 | 264.82427936098 | 2004 | 235.90307758136 | 2003 | 306.91919870059 | 2002 | 266.83091175086 | 2001 | 285.73874533182 | 2000 | 248.31443841749 | 1999 | 235.19696607578 | 1998 | 242.42192214851 | 1997 | 240.73443480249 | 1996 | 287.87989107918 | 1995 | 226.20578280594 | 1994 | 222.81998967268 | 1993 | 274.88848397379 | 1992 | 256.87994926014 | 1991 | 230.160331513 | 1990 | 296.13735522711 | 1989 | 244.24908455265 | 1988 | 255.75827573722 | 1987 | 267.57515453852 | 1986 | 384.43091566972 | 1985 | 348.98957175243 | 1984 | 364.92967671011 | 1983 | 455.48661273687 | 1982 | 474.49747163964 | 1981 | 488.0928751488 | 1980 | 555.36409775668 |
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