Year	Index
1980	8.114
1981	7.829
1982	8.633
1983	9.299
1984	11.374
1985	14.014
1986	15.014
1987	17.568
1988	22.146
1989	23.503
1990	23.299
1991	24.787
1992	27.26
1993	30.196
1994	34.523
1995	36.995
1996	42.956
1997	45.224
1998	49.594
1999	56.654
2000	64.682
2001	70.06
2002	70.891
2003	73.201
2004	80.58
2005	93.047
2006	100
2007	104.924
2008	109.89
2009	116.992
2010	127.427
2011	145.214
2012	145.495
2013	148.855
2014	166.574
2015	169.681
2016	189.964
2017	194.92
2018	200.509
2019	208.949
2020	217.361
2021	227.299
2022	237.751
2023	250.237
2024	260.413