Year	Index
1980	30.605
1981	32.374
1982	38.002
1983	42.451
1984	47.435
1985	53.621
1986	56.904
1987	54.554
1988	53.559
1989	53.8
1990	53.974
1991	53.028
1992	53.024
1993	52.63
1994	69.526
1995	75.141
1996	77.271
1997	78.65
1998	79.428
1999	80.078
2000	80.682
2001	83.145
2002	85.139
2003	85.098
2004	85.535
2005	86.996
2006	88.834
2007	94.043
2008	100
2009	97.752
2010	98.953
2011	102.321
2012	103.772
2013	104.509
2014	103.377
2015	103.51
2016	104.378
2017	105.752
2018	106.243
2019	107.63
2020	109.244
2021	110.883
2022	112.546
2023	114.234
2024	115.948