Year	Index
1980	0.91
1981	1.16
1982	1.43
1983	1.67
1984	1.98
1985	2.43
1986	2.93
1987	3.64
1988	4.67
1989	5.9
1990	7.81
1991	9.91
1992	12.41
1993	15.22
1994	18.66
1995	22.28
1996	27.08
1997	31.83
1998	37.07
1999	40.42
2000	43.86
2001	47.13
2002	50.35
2003	53.56
2004	56.48
2005	59.21
2006	61.85
2007	65.35
2008	70.32
2009	71.67
2010	73.87
2011	76.59
2012	78.47
2013	80.01
2014	82.99
2015	88.65
2016	93.77
2017	97.63
2018	100.73
2019	103.943
2020	107.104
2021	110.362
2022	113.719
2023	117.178
2024	120.742