Year	Index
1980	3.986
1981	4.458
1982	5.1
1983	5.868
1984	6.547
1985	7.529
1986	8.71
1987	9.759
1988	10.969
1989	12.578
1990	14.083
1991	16.519
1992	19.509
1993	21.592
1994	23.385
1995	25.659
1996	27.94
1997	30.28
1998	32.774
1999	35.322
2000	37.462
2001	40.446
2002	45.386
2003	48.265
2004	50.505
2005	52.345
2006	55.662
2007	60.771
2008	67.266
2009	71.189
2010	73.543
2011	77.96
2012	82.222
2013	86.333
2014	90.275
2015	94.156
2016	100
2017	104.516
2018	109.951
2019	115.888
2020	122.378
2021	129.109
2022	136.21
2023	143.701
2024	151.605