Year	Index
1980	34.142
1981	34.576
1982	36.854
1983	39.47
1984	40.024
1985	42.937
1986	44.723
1987	48.305
1988	50.589
1989	49.084
1990	51.181
1991	54.247
1992	57.668
1993	61.559
1994	62.069
1995	62.709
1996	64.508
1997	66.765
1998	71.739
1999	76.639
2000	73.021
2001	75.465
2002	77.929
2003	84.099
2004	85.863
2005	93.425
2006	96.879
2007	99.859
2008	102.048
2009	103.481
2010	107.811
2011	117.942
2012	122.16
2013	126.584
2014	131.467
2015	136.89
2016	142.416
2017	145.323
2018	149.682
2019	154.173
2020	158.952
2021	163.88
2022	168.96
2023	174.367
2024	179.772