Year	Index
1980	0.464
1981	0.54
1982	0.592
1983	0.658
1984	0.742
1985	0.809
1986	0.916
1987	1.051
1988	1.358
1989	1.646
1990	1.751
1991	2.107
1992	2.387
1993	3.06
1994	3.923
1995	7.022
1996	10.439
1997	12.283
1998	15.096
1999	20.986
2000	27.611
2001	34.254
2002	42.12
2003	46.478
2004	53.378
2005	59.112
2006	70.915
2007	73.822
2008	82.655
2009	89.184
2010	100
2011	114.076
2012	134.217
2013	170.859
2014	206.541
2015	249.72
2016	301.024
2017	333.763
2018	360.845
2019	388.111
2020	416.298
2021	442.633
2022	466.751
2023	488.819
2024	510.474