Year	Index
1980	0.12
1981	0.134
1982	0.134
1983	0.144
1984	0.148
1985	0.148
1986	0.169
1987	0.211
1988	0.298
1989	0.432
1990	0.606
1991	0.926
1992	1.179
1993	1.564
1994	2.744
1995	3.757
1996	5.699
1997	10.286
1998	12.43
1999	13.623
2000	14.931
2001	16.338
2002	17.813
2003	19.59
2004	22.576
2005	26.459
2006	32.957
2007	42.04
2008	52.48
2009	60.923
2010	68.776
2011	76.987
2012	84.999
2013	91.063
2014	96.915
2015	100.752
2016	105.913
2017	114.058
2018	124.374
2019	131.782
2020	138.371
2021	143.906
2022	148.223
2023	152.67
2024	157.25