Year	Index
1980	3.63
1981	4.344
1982	4.776
1983	6.078
1984	7.285
1985	9.522
1986	11.377
1987	13.639
1988	15.641
1989	18.305
1990	23.07
1991	28.103
1992	32.446
1993	36.581
1994	40.773
1995	44.128
1996	47.375
1997	50.277
1998	52.844
1999	54.605
2000	56.701
2001	58.723
2002	60.183
2003	61.874
2004	62.525
2005	64.434
2006	66.626
2007	69.567
2008	75.635
2009	76.769
2010	77.849
2011	80.446
2012	82.859
2013	84.341
2014	88.317
2015	92.158
2016	95.649
2017	97.737
2018	100.003
2019	102.339
2020	105.376
2021	108.538
2022	111.795
2023	115.149
2024	118.604