Year	Index
1980	4.338
1981	5.659
1982	7.465
1983	8.919
1984	9.789
1985	10.929
1986	12.099
1987	15.632
1988	18.34
1989	20.283
1990	23.091
1991	25.798
1992	29.945
1993	32.417
1994	52.262
1995	71.762
1996	77.705
1997	81.468
1998	86.684
1999	95.443
2000	104.858
2001	110.817
2002	125.8
2003	124.806
2004	158.912
2005	177.092
2006	196.27
2007	212.393
2008	233.932
2009	252.632
2010	278.388
2011	297.604
2012	314.8
2013	334.5
2014	354.658
2015	381.48
2016	408
2017	444.748
2018	471.704
2019	501.828
2020	532.151
2021	560.888
2022	588.932
2023	618.379
2024	649.297