Year	2015 = 100
1980	24.4636960875
1981	25.7270794672
1982	25.9567855341
1983	25.382520355
1984	25.4973734003
1985	23.0854596957
1986	21.1329581296
1987	23.5448718295
1988	23.0854596957
1989	22.6260475619
1990	24.6934021544
1991	24.6243817732
1992	25.1135993324
1993	24.2340417333
1994	22.5595863525
1995	20.2981882089
1996	19.7812564222
1997	20.2177765976
1998	22.4578143473
1999	22.2625290032
2000	23.7214253839
2001	22.5152512125
2002	22.6372471134
2003	27.3667134751
2004	30.0232833761
2005	31.8564383615
2006	38.5650642397
2007	54.3618104448
2008	65.8912272902
2009	51.7749688909
2010	42.9500242812
2011	58.6523442687
2012	64.8387541637
2013	82.6456757795
2014	92.2436057367
2015	100
2016	267.2811536337
2017	410.7505525459
2018	413.8667322987
2019	475.3654178715
2020	334.4221277813
2021	460.7240716308