Year	2000 = 100
1981	38.17689142
1982	43.6305336
1983	37.28811785
1984	32.11533696
1985	39.11615953
1986	40.55513735
1987	41.61715139
1988	35.70417185
1989	36.98421988
1990	39.56828338
1991	41.70429518
1992	58.35073688
1993	64.36202951
1994	67.86337157
1995	72.73481412
1996	72.48408666
1997	84.09259348
1998	91.22884378
1999	95.65037307
2000	100
2001	105.991979
2002	98.42943389
2003	100.5516004
2004	109.7952412
2005	820.2452824
2006	934.7219718
2007	1026.248431
2008	1142.132801
2009	1246.85276
2010	1278.256636
2011	1693.406973
2012	1886.56415
2013	1706.459228
2014	1507.850155
2015	1320.289145
2016	1302.494942
2017	1290.610111
2018	1335.709058