Year	Index
1980	6.051
1981	6.665
1982	6.536
1983	7.172
1984	7.957
1985	9.375
1986	10.715
1987	12.296
1988	14.468
1989	16.444
1990	18.601
1991	21.498
1992	24.241
1993	26.712
1994	29.298
1995	32.723
1996	34.991
1997	38.213
1998	41.657
1999	44.459
2000	46.812
2001	51.527
2002	56.638
2003	58.04
2004	61.698
2005	65.634
2006	70.764
2007	79.035
2008	86.323
2009	87.359
2010	91.999
2011	98.212
2012	102.256
2013	112.472
2014	125.965
2015	136.055
2016	139.835
2017	147.038
2018	155.809
2019	163.629
2020	173.56
2021	182.861
2022	192.701
2023	203.574
2024	215.259