Year	Index
1980	31.174
1981	35.427
1982	39.444
1983	42.783
1984	45.444
1985	48.041
1986	51.489
1987	55.977
1988	59.714
1989	62.429
1990	65.008
1991	67.243
1992	68.808
1993	70.383
1994	71.351
1995	73.107
1996	74.029
1997	75.93
1998	77.64
1999	79.477
2000	81.929
2001	84.391
2002	85.476
2003	87.603
2004	88.001
2005	89.349
2006	91.431
2007	92.082
2008	95.539
2009	97.638
2010	100
2011	101.285
2012	101.991
2013	104.153
2014	106.28
2015	108.587
2016	112.442
2017	114.551
2018	117.718
2019	119.954
2020	121.994
2021	124.251
2022	126.736
2023	129.27
2024	131.856