Year	Index
1980	35.467
1981	39.051
1982	47.211
1983	51.254
1984	57.312
1985	57.462
1986	57.99
1987	57.208
1988	56.873
1989	57.328
1990	59.784
1991	58.424
1992	57.255
1993	59.029
1994	83.832
1995	95.802
1996	93.864
1997	95.938
1998	98.304
1999	100
2000	99.38
2001	104.03
2002	107.684
2003	99.506
2004	103.087
2005	110.82
2006	115.97
2007	121.253
2008	129.439
2009	136.138
2010	142.085
2011	159.352
2012	166.691
2013	167.764
2014	169.913
2015	174.811
2016	177.243
2017	180.671
2018	184.114
2019	187.967
2020	192.177
2021	196.481
2022	200.882
2023	205.381
2024	209.981