Year	Index
1980	0.269
1981	0.201
1982	0.236
1983	0.267
1984	0.314
1985	0.418
1986	0.471
1987	1.327
1988	1.968
1989	2.901
1990	5.412
1991	6.087
1992	7.963
1993	11.831
1994	17.896
1995	26.85
1996	36.405
1997	39.798
1998	41.919
1999	45.591
2000	50.07
2001	57.379
2002	65.679
2003	69.096
2004	74.015
2005	78.242
2006	84.359
2007	91.621
2008	98.935
2009	100
2010	107.644
2011	111.231
2012	117.743
2013	122.356
2014	125.578
2015	131.081
2016	146.703
2017	165.57
2018	175.015
2019	184.64
2020	194.796
2021	205.509
2022	216.812
2023	228.737
2024	241.318