Year	Index
1980	9.485
1981	11.174
1982	13.225
1983	16.735
1984	20.767
1985	25.083
1986	29.669
1987	32.478
1988	36.803
1989	40.769
1990	45.384
1991	50.344
1992	54.882
1993	57.794
1994	61.742
1995	65.227
1996	66.784
1997	69.38
1998	72.047
1999	74.49
2000	77.067
2001	79.93
2002	83.293
2003	86.158
2004	88.222
2005	91.16
2006	94.063
2007	96.866
2008	98.549
2009	99.629
2010	100.27
2011	100
2012	99.602
2013	101.861
2014	102.625
2015	104.707
2016	106.541
2017	108.164
2018	109.916
2019	111.809
2020	113.703
2021	115.636
2022	117.65
2023	119.631
2024	121.665