Year	Index
1980	0.324
1981	0.385
1982	0.463
1983	0.523
1984	0.596
1985	0.727
1986	0.899
1987	1.148
1988	1.7
1989	2.014
1990	2.428
1991	3.14
1992	3.892
1993	4.828
1994	6.354
1995	8.109
1996	9.779
1997	12.041
1998	18.582
1999	24.417
2000	26.727
2001	29.766
2002	31.814
2003	33.708
2004	35.727
2005	37.351
2006	43.503
2007	46.085
2008	53.43
2009	58.379
2010	63.777
2011	71.141
2012	79.914
2013	87.639
2014	92.947
2015	100
2016	107.471
2017	110.378
2018	114.765
2019	118.975
2020	124.715
2021	130.991
2022	137.486
2023	144.282
2024	151.414