Year	Index
1988	0.001
1989	0.042
1990	3.191
1991	16.26
1992	28.216
1993	41.923
1994	51.873
1995	57.647
1996	64.304
1997	69.8
1998	74.864
1999	77.462
2000	80.373
2001	81.961
2002	82.118
2003	83.975
2004	87.05
2005	88.458
2006	90.228
2007	91.833
2008	97.148
2009	100
2010	101.53
2011	104.951
2012	108.787
2013	111.84
2014	115.47
2015	119.566
2016	123.863
2017	127.335
2018	129.012
2019	132.094
2020	134.733
2021	137.365
2022	140.106
2023	142.901
2024	145.752