Year	2015 = 100
1987	18.8086828309
1988	16.541754069
1989	18.6516461147
1990	18.1042883328
1991	17.6755359632
1992	23.4722091078
1993	24.6169205321
1994	26.0828952478
1995	35.1000353114
1996	38.7770452561
1997	25.0563523604
1998	23.9201426416
1999	25.1101005688
2000	36.6383337095
2001	44.5431263482
2002	50.3316388572
2003	57.0931908039
2004	61.985846079
2005	64.4318882123
2006	60.8484424231
2007	63.4237225415
2008	76.1976192611
2009	73.1976387164
2010	83.1925461456
2011	77.8628903693
2012	92.6605666374
2013	83.1458775184
2014	87.7690214672
2015	100
2016	90.675833697
2017	81.0217516559
2018	77.0201847326
2019	94.0835985294
2020	99.3649030264
2021	92.9323334928