Year	Index
1980	1.212
1981	1.531
1982	1.889
1983	2.54
1984	3.241
1985	4.511
1986	5.797
1987	7.67
1988	10.031
1989	13.728
1990	16.284
1991	22.433
1992	27.085
1993	34.156
1994	47.125
1995	59.741
1996	69.029
1997	79.627
1998	88.593
1999	94.761
2000	100
2001	104.854
2002	109.472
2003	114.467
2004	119.163
2005	125.1
2006	133.431
2007	142
2008	161.133
2009	180.833
2010	190.874
2011	228.58
2012	256.15
2013	270.395
2014	283.246
2015	302.613
2016	317.865
2017	330.484
2018	341.227
2019	355.173
2020	372.589
2021	390.859
2022	410.025
2023	430.13
2024	451.222