Year	Index
1980	9.273
1981	10.112
1982	11.165
1983	12.326
1984	12.96
1985	14.116
1986	15.17
1987	16.648
1988	17.487
1989	18.648
1990	21.448
1991	24.32
1992	25.738
1993	28.184
1994	30.95
1995	33.679
1996	37.26
1997	40.628
1998	44.28
1999	45.91
2000	47.257
2001	49.668
2002	51.547
2003	53.603
2004	55.872
2005	58.6
2006	62.703
2007	66.642
2008	72.879
2009	80.56
2010	87.944
2011	95.667
2012	105.7
2013	113.8
2014	119.8
2015	126.1
2016	130.6
2017	136.6
2018	140.25
2019	145.981
2020	152.244
2021	158.64
2022	165.267
2023	172.02
2024	178.886