Year	Index
1980	17.085
1981	18.543
1982	20.039
1983	21.846
1984	22.092
1985	22.995
1986	24.733
1987	24.538
1988	24.661
1989	28.413
1990	31.973
1991	33.448
1992	36.417
1993	37.739
1994	40.394
1995	40.974
1996	42.158
1997	42.376
1998	44.977
1999	45.19
2000	44.981
2001	45.57
2002	45.777
2003	46.838
2004	48.545
2005	49.789
2006	55.99
2007	58.818
2008	70.504
2009	72.496
2010	78.609
2011	84.051
2012	88.628
2013	93.586
2014	96.809
2015	98.71
2016	100.001
2017	101.705
2018	103.638
2019	105.918
2020	108.566
2021	111.28
2022	114.062
2023	116.913
2024	119.836