Year	Index
1980	0.062
1981	0.068
1982	0.084
1983	0.109
1984	0.141
1985	0.189
1986	0.267
1987	0.763
1988	1.155
1989	1.482
1990	2.181
1991	2.948
1992	4.555
1993	6.543
1994	10.244
1995	16.036
1996	19.137
1997	20.323
1998	20.129
1999	21.38
2000	23.826
2001	29.052
2002	31.701
2003	36.08
2004	39.352
2005	43.739
2006	47.839
2007	52.749
2008	58.982
2009	60.314
2010	70.833
2011	75.182
2012	76.697
2013	79.41
2014	80.94
2015	89.483
2016	110.66
2017	116.91
2018	121.03
2019	127.688
2020	134.712
2021	142.122
2022	149.941
2023	158.189
2024	166.891