Year	Index
1980	49.565
1981	55.424
1982	54.066
1983	50.288
1984	50.465
1985	52.914
1986	39.317
1987	43.557
1988	44.849
1989	44.076
1990	44.563
1991	44.393
1992	45.193
1993	41.502
1994	38.999
1995	42.174
1996	48.719
1997	46.412
1998	38.452
1999	45.409
2000	54.732
2001	50.489
2002	53.103
2003	55.678
2004	61.759
2005	75.575
2006	87.788
2007	91.569
2008	108.659
2009	90.006
2010	100
2011	117.227
2012	126.005
2013	126.285
2014	117.752
2015	87.185
2016	81.223
2017	92.312
2018	106.554
2019	100.972
2020	102.439
2021	104.138
2022	105.934
2023	107.951
2024	110.296