Year	Index
1980	25.192
1981	27.74
1982	31.091
1983	33.795
1984	35.81
1985	37.701
1986	40.005
1987	42.869
1988	46.756
1989	50.293
1990	52.817
1991	53.567
1992	54.257
1993	54.879
1994	55.561
1995	57.173
1996	58.231
1997	58.879
1998	59.445
1999	59.95
2000	62.613
2001	64.794
2002	66.68
2003	68.922
2004	71.146
2005	74.586
2006	78.245
2007	81.734
2008	86.912
2009	87.253
2010	91.897
2011	96.35
2012	95.8
2013	97.074
2014	97.396
2015	96.614
2016	97.629
2017	101.159
2018	103.165
2019	105.463
2020	107.14
2021	109.414
2022	111.909
2023	114.697
2024	117.114