Year	Index
1980	37.222
1981	47.172
1982	46.605
1983	48.847
1984	50.394
1985	50.858
1986	54.932
1987	64.648
1988	68.46
1989	73.841
1990	77.034
1991	81.368
1992	85.552
1993	87.046
1994	89.363
1995	90.857
1996	90.782
1997	95.415
1998	99.6
1999	99.6
2000	103.7
2001	106.1
2002	108.5
2003	111.7
2004	112.6
2005	114.7
2006	116.9
2007	121.7
2008	128.8
2009	131.926
2010	136.268
2011	137.9
2012	139
2013	141.1
2014	142.6
2015	144.7
2016	147.8
2017	152.7
2018	156.726
2019	160.858
2020	164.368
2021	167.954
2022	171.619
2023	175.363
2024	179.19