Year	Index
1980	40.433
1981	42.511
1982	45.73
1983	48.296
1984	50.923
1985	53.279
1986	54.769
1987	55.692
1988	56.9
1989	59.63
1990	61.306
1991	63.07
1992	65.23
1993	67.835
1994	69.255
1995	72.112
1996	72.432
1997	73.084
1998	74.37
1999	74.793
2000	76.307
2001	77.91
2002	79.219
2003	80.774
2004	82.374
2005	84.133
2006	86.077
2007	87.805
2008	89.486
2009	90.183
2010	91.881
2011	93.721
2012	95.571
2013	96.571
2014	97.257
2015	98.226
2016	100
2017	101.668
2018	103.02
2019	104.813
2020	106.495
2021	108.298
2022	110.252
2023	112.299
2024	114.359