Year	Index
1980	7.982
1981	8.843
1982	9.672
1983	9.901
1984	9.806
1985	10.256
1986	9.531
1987	9.649
1988	9.878
1989	11.443
1990	11.254
1991	13.142
1992	14.003
1993	16.231
1994	17.317
1995	26.859
1996	30.502
1997	35.236
1998	36.041
1999	34.965
2000	35.938
2001	36.355
2002	34.502
2003	42.058
2004	47.536
2005	51.892
2006	57.374
2007	64.132
2008	73.304
2009	79.341
2010	81.427
2011	87.396
2012	92.622
2013	97.047
2014	100
2015	100.286
2016	105.804
2017	113.549
2018	112.686
2019	117.43
2020	123.301
2021	129.503
2022	136.016
2023	142.857
2024	150.043