Year	Index
1980	26.364
1981	29.29
1982	29.053
1983	31.926
1984	32.243
1985	29.29
1986	31.955
1987	35.694
1988	38.009
1989	40.732
1990	47.062
1991	52.945
1992	61.87
1993	74.322
1994	76.838
1995	81.055
1996	86.116
1997	92.643
1998	91.336
1999	94.036
2000	92.929
2001	93.554
2002	94.422
2003	91.775
2004	97.593
2005	99.993
2006	103.493
2007	110.525
2008	123.82
2009	129.447
2010	137.42
2011	152.892
2012	169.54
2013	175.978
2014	179.713
2015	183.112
2016	184.579
2017	188.773
2018	191.552
2019	195.792
2020	200.31
2021	205.246
2022	210.461
2023	215.394
2024	219.735