Year	Index
1980	42.984
1981	49.285
1982	55.812
1983	63.938
1984	65.603
1985	72.463
1986	74.21
1987	69.025
1988	66.31
1989	66.738
1990	66.032
1991	65.528
1992	65.528
1993	62.403
1994	90.328
1995	94.864
1996	99.236
1997	99.592
1998	96.62
1999	92.55
2000	100
2001	102.539
2002	111.855
2003	110.433
2004	110.098
2005	112.524
2006	120.531
2007	120.279
2008	137.749
2009	136.152
2010	139.231
2011	145.275
2012	153.884
2013	162.895
2014	178.648
2015	187.29
2016	196.093
2017	204.329
2018	209.396
2019	214.198
2020	219.921
2021	225.104
2022	231.002
2023	236.545
2024	242.231