Year	Index
1980	0.021
1981	0.027
1982	0.033
1983	0.049
1984	0.082
1985	0.15
1986	0.256
1987	0.403
1988	0.681
1989	1.288
1990	2.949
1991	5.351
1992	8.504
1993	13.001
1994	18.733
1995	25.372
1996	31.545
1997	36.33
1998	39.46
1999	41.11
2000	43.18
2001	44.73
2002	56.34
2003	62.08
2004	66.79
2005	70.06
2006	74.53
2007	80.87
2008	88.31
2009	93.52
2010	100
2011	108.6
2012	116.72
2013	126.67
2014	137.13
2015	150.07
2016	162.23
2017	172.86
2018	186.62
2019	200.617
2020	214.66
2021	229.686
2022	245.764
2023	262.967
2024	281.375