Year	Index
1980	0.034
1981	0.041
1982	0.083
1983	0.101
1984	0.178
1985	0.205
1986	0.241
1987	0.302
1988	0.484
1989	1.7
1990	11.656
1991	19.85
1992	28.386
1993	38.406
1994	50.773
1995	64.926
1996	77.846
1997	89.445
1998	100
1999	107.3
2000	118.137
2001	124.635
2002	127.003
2003	128.072
2004	132.544
2005	135.371
2006	136.77
2007	140.178
2008	146.089
2009	151.129
2010	155.033
2011	161.648
2012	167.629
2013	169.137
2014	169.095
2015	167.517
2016	166.54
2017	169.829
2018	172.546
2019	175.929
2020	179.29
2021	182.844
2022	186.73
2023	190.838
2024	195.179