Year	Index
1980	28.65
1981	33.56
1982	36.324
1983	34.675
1984	37.043
1985	37.043
1986	37.409
1987	31.625
1988	35.864
1989	45.166
1990	49.435
1991	52.82
1992	54.753
1993	55.825
1994	58.491
1995	60.944
1996	62.49
1997	66.436
1998	65.89
1999	67.751
2000	66.493
2001	69
2002	69.349
2003	71.33
2004	74.11
2005	77.201
2006	82.957
2007	87.183
2008	95.046
2009	97.588
2010	103.132
2011	106.136
2012	112.499
2013	115.997
2014	117.928
2015	116.071
2016	117.049
2017	120.841
2018	125.25
2019	128.378
2020	131.584
2021	134.9
2022	138.299
2023	141.784
2024	145.356