Year	Index
1980	0.004
1981	0.006
1982	0.013
1983	0.019
1984	0.031
1985	0.059
1986	0.328
1987	1.51
1988	7.165
1989	14.027
1990	19.081
1991	34.693
1992	47.773
1993	51.776
1994	56.689
1995	66.287
1996	69.992
1997	72.162
1998	78.014
1999	81.221
2000	79.783
2001	79.536
2002	82.781
2003	85.512
2004	92.259
2005	100
2006	107.5
2007	116.476
2008	143.406
2009	153.042
2010	167.138
2011	198.341
2012	216.396
2013	230.668
2014	240.089
2015	241.605
2016	248.051
2017	256.785
2018	265.875
2019	274.095
2020	283.14
2021	292.908
2022	303.307
2023	314.529
2024	326.796