Year	Index
1980	4.374
1981	5.707
1982	7.528
1983	8.993
1984	9.867
1985	10.91
1986	12.491
1987	14.422
1988	18.22
1989	19.863
1990	22.219
1991	24.116
1992	27.63
1993	30.39
1994	42.239
1995	62.952
1996	75.392
1997	78.778
1998	83.67
1999	90.415
2000	100.062
2001	107.984
2002	125.8
2003	123.657
2004	140.914
2005	166.791
2006	184.747
2007	203.754
2008	222.696
2009	242.636
2010	265.074
2011	290.21
2012	306.792
2013	324.667
2014	344.408
2015	369.908
2016	394.545
2017	427.216
2018	458.366
2019	488.865
2020	519.431
2021	549.341
2022	577.796
2023	606.686
2024	637.02