Year	2015 = 100
1980	28.09524872
1981	28.8779768084
1982	22.4197558998
1983	21.930074732
1984	23.9811651249
1985	24.2504064503
1986	29.9349453974
1987	33.3168877939
1988	32.7554327487
1989	34.0534330244
1990	32.9117165021
1991	32.7086547473
1992	31.1340334091
1993	32.1237511811
1994	26.6873856004
1995	34.2960288855
1996	39.7111913414
1997	74.0072202563
1998	50.5415162591
1999	50.5415162591
2000	58.8086371968
2001	55.956678715
2002	70.397111921
2003	74.0072202563
2004	72.6480144504
2005	61.924187711
2006	71.6714801517
2007	62.0559566959
2008	92.3610108465
2009	68.0036101493
2010	57.7851985698
2011	81.0216606831
2012	83.0324910064
2013	100.5090252751
2014	102.606498246
2015	100
2016	92.2039711433
2017	90.759927821
2018	97.8808664555
2019	104.0722022008
2020	94.050541533
2021	89.3501805196