Year	Index
1980	0.04
1981	0.068
1982	0.086
1983	0.197
1984	0.263
1985	0.331
1986	0.472
1987	0.64
1988	0.843
1989	1.097
1990	1.48
1991	1.782
1992	2.011
1993	2.319
1994	3.036
1995	4.323
1996	5.982
1997	7.228
1998	8.447
1999	9.642
2000	12.268
2001	16.523
2002	20.289
2003	26.012
2004	29.616
2005	34.031
2006	38.125
2007	44.109
2008	51.683
2009	59.06
2010	68.795
2011	77.153
2012	88.574
2013	100
2014	122.164
2015	138.764
2016	159.925
2017	176.481
2018	194.668
2019	207.739
2020	225.64
2021	245.832
2022	267.844
2023	290.89
2024	318.383