Year	Index
1980	4.055
1981	5.143
1982	6.618
1983	8.039
1984	8.859
1985	9.782
1986	11.168
1987	13.74
1988	16.647
1989	18.641
1990	20.777
1991	23.667
1992	26.626
1993	30.078
1994	42.593
1995	61.834
1996	72.86
1997	78.172
1998	84.775
1999	93.08
2000	100
2001	107.305
2002	123.322
2003	126.731
2004	144.858
2005	171.146
2006	190.095
2007	209.395
2008	228.428
2009	247.553
2010	269.301
2011	291.486
2012	307.462
2013	323.145
2014	344.51
2015	369.01
2016	393.663
2017	426.261
2018	457.342
2019	487.773
2020	518.27
2021	548.113
2022	576.505
2023	605.33
2024	635.597