Year	Index
1980	0.058
1981	0.061
1982	0.072
1983	0.092
1984	0.119
1985	0.156
1986	0.219
1987	0.579
1988	0.918
1989	1.305
1990	1.876
1991	2.499
1992	3.626
1993	5.158
1994	8.414
1995	12.424
1996	18.449
1997	19.807
1998	20.101
1999	20.679
2000	23.308
2001	25.42
2002	29.682
2003	33.676
2004	37.931
2005	40.369
2006	45.716
2007	49.447
2008	56.618
2009	58.763
2010	66.065
2011	73.442
2012	75.353
2013	78.564
2014	80.576
2015	83.437
2016	100.001
2017	115.114
2018	119.617
2019	124.601
2020	131.455
2021	138.687
2022	146.316
2023	154.365
2024	162.856