Year	Index
1980	21.724
1981	23.293
1982	26.125
1983	27.778
1984	29.447
1985	29.812
1986	29.439
1987	30.868
1988	32.151
1989	34.461
1990	39.799
1991	40.425
1992	37.629
1993	40.132
1994	46.378
1995	48.311
1996	49.205
1997	47.461
1998	46.58
1999	48.585
2000	54.436
2001	56.108
2002	53.592
2003	59.411
2004	65.091
2005	73.786
2006	74.485
2007	84.472
2008	104.467
2009	76.422
2010	85.908
2011	99.083
2012	100
2013	103.41
2014	105.254
2015	93.943
2016	90.817
2017	95.709
2018	96.402
2019	96.943
2020	98.916
2021	101.093
2022	103.7
2023	106.852
2024	110.285