Year	Index
1980	41.036
1981	45.842
1982	48.735
1983	49.319
1984	48.863
1985	48.356
1986	35.363
1987	37.747
1988	34.369
1989	37.317
1990	39.967
1991	39.063
1992	38.947
1993	38.299
1994	38.718
1995	40.971
1996	44.184
1997	45.712
1998	39.343
1999	45.043
2000	49.974
2001	49.152
2002	52.079
2003	53.286
2004	59.177
2005	71.101
2006	79.33
2007	86.021
2008	101.238
2009	85.331
2010	100
2011	115.529
2012	120.168
2013	118.737
2014	116.012
2015	96.396
2016	93.46
2017	100.531
2018	111.764
2019	106.968
2020	108.564
2021	109.873
2022	111.432
2023	113.32
2024	115.452