Year	Index
1980	0.018
1981	0.024
1982	0.029
1983	0.043
1984	0.067
1985	0.116
1986	0.204
1987	0.334
1988	0.542
1989	0.978
1990	2.078
1991	4.197
1992	7.069
1993	10.893
1994	15.766
1995	22.426
1996	28.782
1997	34.487
1998	38.214
1999	40.378
2000	42.3
2001	44.147
2002	50.313
2003	60.063
2004	65.563
2005	68.645
2006	73.037
2007	78.963
2008	85.183
2009	91.199
2010	97.308
2011	105.183
2012	113.701
2013	123.451
2014	134.41
2015	146.058
2016	160.138
2017	170.095
2018	183.033
2019	197.003
2020	211.219
2021	226.34
2022	242.093
2023	258.948
2024	277.03