Year	Index
1980	34.481
1981	37.164
1982	39.287
1983	42.585
1984	44.317
1985	46.273
1986	50.129
1987	53.873
1988	56.109
1989	56.165
1990	56.221
1991	57.171
1992	59.211
1993	60.703
1994	80.249
1995	86.428
1996	89.453
1997	93.556
1998	95.418
1999	96.902
2000	100.396
2001	105.199
2002	109.826
2003	109.706
2004	114.581
2005	117.48
2006	119.873
2007	121.619
2008	132.509
2009	130.297
2010	136.947
2011	139.641
2012	144.402
2013	145.001
2014	146.239
2015	148.308
2016	147.97
2017	149.532
2018	151.177
2019	154.2
2020	157.284
2021	160.43
2022	163.638
2023	166.911
2024	170.249