Year	Index
1980	8.975
1981	10.286
1982	10.964
1983	11.823
1984	12.569
1985	13.88
1986	15.824
1987	16.751
1988	17.746
1989	19.373
1990	21.17
1991	26.652
1992	35.101
1993	42.297
1994	54.563
1995	70.823
1996	84.067
1997	88.859
1998	93.258
1999	95.682
2000	95.969
2001	100
2002	101.43
2003	105.75
2004	109.95
2005	111.47
2006	114.05
2007	118.24
2008	123.98
2009	131.1
2010	136.23
2011	142.36
2012	155.053
2013	160.1
2014	164.77
2015	172.653
2016	183.699
2017	193.97
2018	202.253
2019	213.579
2020	227.888
2021	247.715
2022	272.982
2023	306.285
2024	349.165