Year	Index
1980	3.51
1981	3.912
1982	4.407
1983	5.699
1984	6.542
1985	8.987
1986	10.972
1987	13.809
1988	16.943
1989	19.226
1990	23.55
1991	28.822
1992	32.804
1993	36.66
1994	41.851
1995	46.789
1996	48.226
1997	49.691
1998	50.209
1999	51.335
2000	53.548
2001	55.64
2002	57.535
2003	60.176
2004	64.915
2005	69.885
2006	78.403
2007	82.525
2008	82.398
2009	86.206
2010	93.987
2011	96.947
2012	98.058
2013	100.02
2014	105.911
2015	111.162
2016	116.08
2017	121.914
2018	124.375
2019	126.473
2020	130.242
2021	133.978
2022	137.744
2023	141.615
2024	145.751