Year	Index
1980	28.06
1981	28.899
1982	31.294
1983	33.587
1984	39.181
1985	39.662
1986	39.047
1987	37.465
1988	37.101
1989	36.942
1990	35.27
1991	35.504
1992	35.497
1993	37.677
1994	55.506
1995	62.543
1996	65.413
1997	68.17
1998	70.651
1999	71.206
2000	72.805
2001	78.19
2002	83.404
2003	87.408
2004	84.881
2005	85.986
2006	87.485
2007	90.051
2008	97.708
2009	100
2010	105.386
2011	108.861
2012	110.877
2013	114.589
2014	119.068
2015	122.767
2016	121.455
2017	119.339
2018	119.835
2019	121.133
2020	123.259
2021	125.251
2022	127.261
2023	129.233
2024	131.33