Year	Index
1980	37.114
1981	44.836
1982	48.814
1983	53.135
1984	55.856
1985	57.161
1986	58.906
1987	45.718
1988	48.272
1989	48.954
1990	56.494
1991	50.068
1992	50.174
1993	49.918
1994	73.157
1995	74.135
1996	84.19
1997	84.987
1998	69.871
1999	83.29
2000	106.682
2001	100
2002	100.417
2003	100.737
2004	108.098
2005	132.666
2006	143.927
2007	151.98
2008	174.031
2009	147.145
2010	171.603
2011	193.364
2012	187.676
2013	176.322
2014	174.619
2015	159.031
2016	152.241
2017	158.015
2018	170.299
2019	166.846
2020	170.147
2021	173.468
2022	175.874
2023	178.715
2024	182.79