Year	Index
1980	0.946
1981	1.075
1982	1.069
1983	1.182
1984	1.332
1985	1.461
1986	1.509
1987	1.988
1988	2.406
1989	4.821
1990	6.834
1991	8.3
1992	10.644
1993	14.012
1994	22.824
1995	34.638
1996	74.654
1997	99.997
1998	118.893
1999	150.029
2000	194.22
2001	209.752
2002	279.013
2003	376.488
2004	504.321
2005	653.618
2006	770.643
2007	889.695
2008	1157.78
2009	1248.46
2010	1822.04
2011	2334.93
2012	2663.21
2013	3608.72
2014	5068.10
2015	14329.10
2016	60369.35
2017	511965.78