Year	Index
1980	4.414
1981	4.917
1982	5.158
1983	5.504
1984	5.681
1985	6.77
1986	8.99
1987	9.965
1988	10.991
1989	12.418
1990	17.134
1991	23.15
1992	25.521
1993	28.932
1994	32.55
1995	35.288
1996	39.189
1997	42.808
1998	45.641
1999	48.018
2000	50.889
2001	54.596
2002	59.038
2003	62.345
2004	67.07
2005	73.178
2006	77.98
2007	83.3
2008	92.758
2009	94.483
2010	98.131
2011	104.23
2012	108.173
2013	112.871
2014	116.729
2015	119.518
2016	124.834
2017	130.358
2018	135.248
2019	139.85
2020	145.029
2021	150.642
2022	156.733
2023	163.238
2024	170.16