Year	Index
1980	29.118
1981	32.32
1982	35.477
1983	38.767
1984	41.787
1985	45.545
1986	48.158
1987	47.392
1988	46.727
1989	47.436
1990	47.428
1991	47.084
1992	46.647
1993	46.586
1994	62.375
1995	66.97
1996	69.861
1997	71.294
1998	73.259
1999	73.518
2000	75.248
2001	76.9
2002	79.437
2003	79.844
2004	80.268
2005	82.261
2006	85.545
2007	90.094
2008	95.983
2009	95.031
2010	96.053
2011	99.452
2012	102.056
2013	102.164
2014	100
2015	101.07
2016	101.871
2017	103.687
2018	106.12
2019	108.054
2020	110.222
2021	111.613
2022	113.877
2023	115.104
2024	117.222