Year	2015 = 100
1981	4.4370759818
1982	4.9134258663
1983	4.8879196768
1984	3.886072588
1985	2.8738638915
1986	3.2991683518
1987	3.0370483929
1988	1.881182517
1989	2.0687270865
1990	3.150190934
1991	4.3523957101
1992	6.8047284699
1993	8.0522495048
1994	8.2508945101
1995	7.5254892625
1996	6.9701121948
1997	8.9749929876
1998	11.9714875359
1999	13.6822818511
2000	21.4857935957
2001	31.6611951944
2002	43.1132026783
2003	30.3782374424
2004	26.9727675402
2005	36.0426826239
2006	39.8427710319
2007	51.9764951374
2008	46.6205937083
2009	53.8822152005
2010	68.1417970521
2011	63.7147866404
2012	61.2618203634
2013	78.4568853364
2014	81.795377166
2015	100
2016	110.2891656529
2017	119.0209926858
2018	133.3111269277
2019	160.1848415862
2020	154.1521801792
2021	80.2860133367