Year	Index
1980	21.198
1981	23.615
1982	27.392
1983	31.091
1984	33.113
1985	34.374
1986	35.575
1987	37.439
1988	40.217
1989	43.372
1990	45.622
1991	48.609
1992	51.464
1993	53.521
1994	55.667
1995	58.426
1996	60.942
1997	63.837
1998	65.812
1999	68.048
2000	70.559
2001	73.321
2002	74.996
2003	77.01
2004	79.591
2005	82.914
2006	86.093
2007	87.912
2008	93.489
2009	96.325
2010	100
2011	104.279
2012	109.385
2013	113.567
2014	118.687
2015	122.822
2016	128.875
2017	136.054
2018	145.095
2019	154.702
2020	162.63
2021	170.137
2022	177.458
2023	184.703
2024	192.146