Year	Index
1980	0.048
1981	0.058
1982	0.068
1983	0.073
1984	0.086
1985	0.146
1986	0.286
1987	1.677
1988	4.277
1989	7.366
1990	12.434
1991	18.843
1992	41.455
1993	53.518
1994	57.783
1995	63.913
1996	69.575
1997	74.96
1998	78.019
1999	78.744
2000	77.166
2001	75.763
2002	79.504
2003	80.867
2004	81.686
2005	80.796
2006	81.51
2007	84.097
2008	90.452
2009	99.763
2010	100
2011	103.362
2012	111.058
2013	114.672
2014	115.985
2015	119.518
2016	120.607
2017	124.989
2018	131.719
2019	134.342
2020	137.062
2021	139.839
2022	142.663
2023	145.469
2024	148.41