Year	Index
1980	0.066
1981	0.083
1982	0.1
1983	0.146
1984	0.285
1985	0.439
1986	0.784
1987	1.544
1988	2.321
1989	3.873
1990	5.118
1991	8.194
1992	15.297
1993	19.994
1994	23.848
1995	35.693
1996	59.103
1997	68.996
1998	74.471
1999	68.572
2000	80.012
2001	78.502
2002	80.479
2003	81.064
2004	83.404
2005	83.655
2006	86.329
2007	94.352
2008	102.542
2009	96.023
2010	101.5
2011	105
2012	106.7
2013	106.6
2014	106.5
2015	109.1
2016	110.8
2017	109.4
2018	115.351
2019	117.831
2020	120.541
2021	123.494
2022	126.952
2023	130.761
2024	134.684