Year	Index
1980	0.834
1981	0.974
1982	1.035
1983	1.184
1984	1.493
1985	1.874
1986	2.469
1987	3.223
1988	4.031
1989	5.301
1990	7.185
1991	10.655
1992	12.156
1993	13.641
1994	15.357
1995	17.057
1996	19.006
1997	19.654
1998	22.849
1999	25.29
2000	28.998
2001	33.039
2002	38.97
2003	44.872
2004	50.182
2005	56.682
2006	61.702
2007	69.498
2008	77.973
2009	80.891
2010	84.605
2011	88.912
2012	93.163
2013	97.272
2014	100
2015	101.605
2016	105.795
2017	108.066
2018	113.357
2019	116.963
2020	122.244
2021	126.966
2022	131.667
2023	136.235
2024	140.653