Year	Index
1980	11.994
1981	13.245
1982	13.747
1983	14.961
1984	15.471
1985	16.24
1986	17.004
1987	17.8
1988	19.721
1989	20.802
1990	23.675
1991	26.672
1992	30.53
1993	33.47
1994	37.42
1995	41.94
1996	46.25
1997	52.01
1998	55.38
1999	57.42
2000	60.35
2001	61.88
2002	64.62
2003	65.86
2004	71.43
2005	77.67
2006	83.61
2007	89.46
2008	108.72
2009	120.64
2010	134.83
2011	152.78
2012	169.99
2013	179.94
2014	194.74
2015	200.89
2016	207.3
2017	215.45
2018	226.68
2019	245.785
2020	262.442
2021	275.564
2022	289.342
2023	303.809
2024	318.999