Year	Index
1980	1.145
1981	1.439
1982	1.855
1983	2.358
1984	3.209
1985	4.278
1986	5.664
1987	7.357
1988	9.652
1989	12.143
1990	16.563
1991	20.736
1992	25.029
1993	31.561
1994	43.523
1995	55.174
1996	66.788
1997	77.566
1998	87.478
1999	94.379
2000	100
2001	105.147
2002	109.937
2003	114.806
2004	119.558
2005	124.769
2006	133.816
2007	143.22
2008	157.938
2009	177.118
2010	189.855
2011	213.95
2012	248.184
2013	267.715
2014	284.132
2015	300.011
2016	315.517
2017	332.305
2018	343.966
2019	355.886
2020	372.007
2021	390.45
2022	409.596
2023	429.68
2024	450.749