Year	Index
1980	21.314
1981	24.384
1982	27.8
1983	31.201
1984	34.012
1985	36.793
1986	39.833
1987	41.662
1988	44.097
1989	47.137
1990	50.221
1991	52.995
1992	55.835
1993	58.586
1994	61.126
1995	63.767
1996	65.854
1997	67.091
1998	68.002
1999	69.892
2000	72.692
2001	74.66
2002	77.673
2003	79.696
2004	82.268
2005	85.341
2006	87.616
2007	91.314
2008	92.622
2009	93.358
2010	96.148
2011	98.434
2012	101.257
2013	101.512
2014	100.455
2015	100.472
2016	102.049
2017	103.184
2018	104.405
2019	105.808
2020	107.56
2021	109.364
2022	111.434
2023	113.536
2024	115.79