Year	Index
1980	25.375
1981	30.036
1982	35.107
1983	38.98
1984	41.829
1985	44.57
1986	47.275
1987	48.749
1988	50.56
1989	53.105
1990	53.456
1991	54.722
1992	56.27
1993	59.234
1994	60.123
1995	63.544
1996	63.979
1997	66.56
1998	70.933
1999	74.019
2000	79.094
2001	84.474
2002	88.888
2003	92.41
2004	92.966
2005	95.884
2006	99.225
2007	100.481
2008	100.078
2009	95.484
2010	92.411
2011	90.942
2012	92.897
2013	94.079
2014	93.887
2015	100.927
2016	100.156
2017	100.54
2018	101.11
2019	102.691
2020	104.284
2021	106.237
2022	108.509
2023	110.773
2024	113.032