Year	Index
1980	8.96
1981	10.094
1982	10.875
1983	12.241
1984	13.038
1985	13.853
1986	15.085
1987	16.451
1988	17.638
1989	18.444
1990	20.509
1991	23.274
1992	25.57
1993	27.431
1994	30.249
1995	33.263
1996	36.4
1997	38.891
1998	43.996
1999	46.503
2000	48.284
2001	50.365
2002	52.371
2003	54.394
2004	56.475
2005	58.962
2006	62.91
2007	66.813
2008	72.886
2009	81.861
2010	90.48
2011	99.075
2012	108.983
2013	119.227
2014	126.142
2015	132.323
2016	138.278
2017	143.259
2018	148.245
2019	153.999
2020	160.537
2021	167.332
2022	174.322
2023	181.445
2024	188.689