Year	Index
1980	28.662
1981	31.724
1982	34.818
1983	36.408
1984	39.908
1985	42.065
1986	43.633
1987	47.392
1988	51.563
1989	58.039
1990	62.43
1991	68.136
1992	74.881
1993	81.33
1994	86.471
1995	90.051
1996	95.349
1997	100.842
1998	102.072
1999	97.891
2000	94.569
2001	92.891
2002	89.731
2003	84.34
2004	81.312
2005	81.19
2006	80.756
2007	83.289
2008	84.357
2009	84.04
2010	84.267
2011	87.552
2012	90.656
2013	92.299
2014	94.93
2015	98.388
2016	100
2017	102.951
2018	106.792
2019	109.23
2020	111.694
2021	113.9
2022	116.188
2023	118.564
2024	121.051