Year	Index
1980	5.571
1981	6.373
1982	8.783
1983	8.611
1984	7.929
1985	7.249
1986	7.505
1987	7.139
1988	6.895
1989	7.092
1990	7.502
1991	24.304
1992	26.634
1993	30.759
1994	32.517
1995	33.818
1996	35.345
1997	36.646
1998	38.749
1999	40.164
2000	42.501
2001	43.917
2002	45.904
2003	47.321
2004	50.124
2005	54.015
2006	59.417
2007	64.31
2008	75.197
2009	76.206
2010	87.95
2011	92.822
2012	100
2013	105.675
2014	114.529
2015	116.345
2016	119.977
2017	121.566
2018	122.815
2019	124.212
2020	126.89
2021	130.046
2022	133.475
2023	137.321
2024	141.44