Year	Index
1980	0.01
1981	0.02
1982	0.04
1983	0.101
1984	0.118
1985	0.236
1986	0.575
1987	1.814
1988	4.837
1989	11.164
1990	16.232
1991	19.612
1992	27.897
1993	36.258
1994	38.379
1995	40.983
1996	44.064
1997	47.469
1998	50.239
1999	53.132
2000	54.929
2001	55.984
2002	55.817
2003	60.678
2004	62.903
2005	68.314
2006	73.245
2007	77.706
2008	87.065
2009	98.399
2010	102.055
2011	117.373
2012	132.254
2013	138.742
2014	143.009
2015	150.748
2016	158.971
2017	167.92
2018	172.327
2019	178.531
2020	186.366
2021	195.477
2022	205.251
2023	215.514
2024	226.29