Year	Index
1980	0.204
1981	0.229
1982	0.251
1983	0.285
1984	0.341
1985	0.378
1986	0.431
1987	0.539
1988	0.722
1989	0.812
1990	0.908
1991	0.983
1992	1.211
1993	1.487
1994	2.002
1995	3.667
1996	5.05
1997	5.512
1998	7.153
1999	10.354
2000	13.419
2001	14.444
2002	15.558
2003	16.776
2004	18.114
2005	19.592
2006	21.226
2007	23.033
2008	25.041
2009	27.149
2010	29.16
2011	31.382
2012	38.066
2013	48.83
2014	60.439
2015	73.651
2016	89.653
2017	100
2018	109.215
2019	118.67
2020	128.346
2021	137.504
2022	145.961
2023	153.732
2024	161.391