Year	Index
1980	31.138
1981	36.264
1982	39.02
1983	39.26
1984	41.726
1985	43.686
1986	47.205
1987	49.877
1988	53.567
1989	56.254
1990	60.326
1991	58.566
1992	62.828
1993	64.99
1994	68.901
1995	71.747
1996	72.285
1997	75.799
1998	78.208
1999	79.878
2000	80.818
2001	83.999
2002	85.748
2003	86.845
2004	90.912
2005	90.469
2006	100
2007	110.207
2008	113.418
2009	113.48
2010	115.127
2011	120.771
2012	118.846
2013	119.599
2014	121.713
2015	121.683
2016	121.805
2017	124.543
2018	124.201
2019	124.627
2020	127.279
2021	130.001
2022	132.783
2023	135.403
2024	138.075