Year	Index
1980	41.286
1981	47.309
1982	52.176
1983	54.928
1984	57.481
1985	60.274
1986	60.393
1987	62.547
1988	65.499
1989	69.648
1990	71.762
1991	76.283
1992	80.857
1993	81.814
1994	82.387
1995	84.725
1996	86.746
1997	93.435
1998	92.249
1999	93.688
2000	95.97
2001	98.658
2002	98.825
2003	100.383
2004	101.817
2005	107.992
2006	115.883
2007	120.558
2008	130.333
2009	135.083
2010	142.95
2011	156.433
2012	163.525
2013	166.492
2014	169.433
2015	167.55
2016	170.083
2017	177.583
2018	184.033
2019	186.444
2020	190.012
2021	194.458
2022	199.008
2023	203.665
2024	208.431