Year	Index
1980	25.627
1981	29.01
1982	32.301
1983	35.179
1984	37.882
1985	43.77
1986	49.768
1987	57.934
1988	63.999
1989	67.018
1990	69.069
1991	69.279
1992	70.554
1993	72.101
1994	72.662
1995	74.107
1996	75.703
1997	76.02
1998	76.827
1999	77.247
2000	79.021
2001	82.469
2002	83.087
2003	84.173
2004	87.077
2005	89.203
2006	91.287
2007	95.249
2008	98.951
2009	99.828
2010	102.7
2011	105.706
2012	105.395
2013	108.821
2014	111.323
2015	111.51
2016	113.46
2017	117.411
2018	118.748
2019	121.37
2020	124.148
2021	127.097
2022	129.875
2023	132.612
2024	135.343