Year	Index
1980	0.002
1981	0.002
1982	0.005
1983	0.007
1984	0.012
1985	0.024
1986	0.138
1987	0.576
1988	2.348
1989	5.487
1990	7.8
1991	13.479
1992	17.868
1993	20.978
1994	24.536
1995	28.717
1996	31.214
1997	33.274
1998	36.214
1999	38.291
2000	39.596
2001	40.368
2002	41.965
2003	44.763
2004	52.759
2005	57.533
2006	62.463
2007	68.479
2008	84.005
2009	89.227
2010	100
2011	121.261
2012	134.51
2013	140.913
2014	146.074
2015	145.795
2016	147.415
2017	153.438
2018	158.449
2019	162.971
2020	167.788
2021	172.838
2022	178.636
2023	185.123
2024	192.312