Year	2015 = 100
1981	12.1358248906
1982	13.2695217492
1983	11.7614486913
1984	11.8545806378
1985	11.7616177105
1986	9.6863439068
1987	9.2886103961
1988	5.1517951074
1989	6.4595488235
1990	9.3454656831
1991	11.3605062067
1992	12.6880387444
1993	14.4972564384
1994	16.1134373905
1995	14.4756370627
1996	16.4233205987
1997	17.5917659812
1998	20.4706130019
1999	21.4834489819
2000	19.7017385676
2001	17.776742667
2002	17.7075798143
2003	17.8785449724
2004	19.830831274
2005	50.445260129
2006	53.9230165965
2007	63.2421782166
2008	68.1845640176
2009	64.3054555136
2010	73.8680942924
2011	87.9523753404
2012	92.1570953249
2013	96.5042766699
2014	96.501228279
2015	100
2016	99.4944333911
2017	98.4378524195
2018	97.4943978456
2019	94.8728476302
2020	69.9632164463
2021	88.0730111938