Year	Index
1980	4.003
1981	4.45
1982	5.371
1983	6.628
1984	8.193
1985	10.391
1986	12.194
1987	14.771
1988	16.588
1989	20.104
1990	25.58
1991	30.382
1992	34.311
1993	38.59
1994	42.128
1995	45.64
1996	48.695
1997	51.637
1998	54.045
1999	55.297
2000	57.816
2001	59.357
2002	61.058
2003	61.729
2004	63.238
2005	65.559
2006	67.268
2007	72.556
2008	77.7
2009	76.528
2010	78.78
2011	82.238
2012	83.436
2013	85.986
2014	90.026
2015	94.014
2016	96.585
2017	98.782
2018	100.896
2019	103.57
2020	106.678
2021	109.879
2022	113.176
2023	116.572
2024	120.07