Year	Index
1980	0.175
1981	0.174
1982	0.29
1983	0.516
1984	0.694
1985	1.028
1986	1.448
1987	1.898
1988	2.827
1989	4.675
1990	6.293
1991	7.13
1992	7.793
1993	8.291
1994	8.931
1995	10.685
1996	12.159
1997	14.501
1998	13.906
1999	30.142
2000	40.347
2001	45.43
2002	50.244
2003	56.828
2004	62.9
2005	68.092
2006	76.389
2007	81.43
2008	85.95
2009	84.423
2010	88.437
2011	95.06
2012	100
2013	106.474
2014	112.571
2015	115.215
2016	118.697
2017	120.964
2018	123.078
2019	126.532
2020	130.859
2021	134.959
2022	139.136
2023	143.45
2024	147.875