| Year | Value | | 2019 | 13,736.720675258 | | 2018 | 13,857.399567107 | | 2013 | 5,830.56622062 | | 2012 | 5,219.8123387943 | | 2011 | 4,668.7162448625 | | 2010 | 4,072.8188483019 | | 2001 | 1,282.711 | | 2000 | 1,307.918 | | 1997 | 787.6999902352 | | 1996 | 794.700007193 | | 1995 | 844.8000027613 | | 1994 | 735.7000054123 | | 1993 | 548.7000040934 | | 1992 | 464.9000005723 | | 1991 | 383.5000038967 | | 1990 | 338.6999948696 | | 1989 | 321.099995412 | | 1988 | 304.10000176 | | 1987 | 253.9000006319 | | 1986 | 229.9999999404 | | 1985 | 221.0999973195 | | 1984 | 208.5000022949 | | 1983 | 162.4999988602 | | 1982 | 142.1000006277 |
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