Year	Index
1980	7.879
1981	9.401
1982	10.692
1983	11.718
1984	12.997
1985	14.327
1986	14.937
1987	16.364
1988	18.586
1989	21.104
1990	25.986
1991	29.747
1992	39.762
1993	61.512
1994	65.579
1995	70.097
1996	77.572
1997	80.874
1998	85.068
1999	91.916
2000	100
2001	102.923
2002	106.488
2003	111.461
2004	124.605
2005	130.725
2006	140.289
2007	148.146
2008	171.076
2009	184.789
2010	195.442
2011	232.447
2012	239.886
2013	257.035
2014	272.505
2015	294.325
2016	313.013
2017	327.085
2018	345.763
2019	361.944
2020	380.041
2021	399.043
2022	418.995
2023	439.945
2024	461.942