Year	Index
1980	1.011
1981	1.304
1982	1.556
1983	1.73
1984	2.216
1985	2.386
1986	2.544
1987	3.423
1988	4.666
1989	9.532
1990	16.71
1991	29.911
1992	33.65
1993	35.938
1994	41.723
1995	45.105
1996	47.128
1997	49.085
1998	51.426
1999	55.86
2000	59.136
2001	60.024
2002	63.679
2003	66.872
2004	70.521
2005	76.36
2006	79.539
2007	90.701
2008	96.479
2009	100
2010	104.43
2011	107.88
2012	111.63
2013	112.62
2014	113.94
2015	111.873
2016	113.5
2017	115.185
2018	117.697
2019	121.277
2020	125.116
2021	129.54
2022	134.12
2023	138.283
2024	141.808