Year	Index
1980	0.132
1981	0.144
1982	0.162
1983	0.192
1984	0.215
1985	0.239
1986	0.272
1987	0.369
1988	0.466
1989	0.462
1990	0.569
1991	0.611
1992	0.831
1993	0.983
1994	1.632
1995	2.855
1996	3.047
1997	3.508
1998	5.373
1999	6.89
2000	9.332
2001	11.396
2002	12.704
2003	13.953
2004	15.863
2005	18.491
2006	20.365
2007	21.897
2008	24.075
2009	25.9
2010	27.524
2011	30.221
2012	40.67
2013	50.227
2014	62.358
2015	77.857
2016	93.405
2017	100
2018	109.892
2019	119.049
2020	128.246
2021	136.818
2022	144.941
2023	152.765
2024	160.353