Year	Index
1980	0.036
1981	0.044
1982	0.093
1983	0.11
1984	0.137
1985	0.16
1986	0.192
1987	0.246
1988	0.416
1989	1.306
1990	8.62
1991	13.381
1992	18.626
1993	24.217
1994	33.07
1995	44.343
1996	52.286
1997	59.566
1998	66.158
1999	70.119
2000	75.204
2001	77.82
2002	79.769
2003	80.38
2004	84.329
2005	86.495
2006	87.988
2007	91.255
2008	94.793
2009	98.368
2010	100
2011	103.229
2012	105.655
2013	105.961
2014	106.49
2015	107.31
2016	107.643
2017	109.75
2018	111.128
2019	113.801
2020	115.649
2021	117.45
2022	119.772
2023	122.365
2024	125.009