Year	Percent change
1980	1.523
1981	2.2
1982	16.928
1983	4.686
1984	-0.32
1985	-0.2
1986	0.7
1987	1.1
1988	2.6
1989	0.9
1990	127.9
1991	161.121
1992	210.386
1993	256.105
1994	136.742
1995	32.272
1996	38.809
1997	154.763
1998	59.097
1999	45.804
2000	45.667
2001	34.454
2002	22.498
2003	15.37
2004	11.855
2005	8.995
2006	6.591
2007	4.834
2008	7.846
2009	5.584
2010	6.113
2011	5.795
2012	3.339
2013	4.002
2014	1.076
2015	-0.596
2016	-1.555
2017	1.344
2018	4.631
2019	3.275
2020	2.952
2021	2.774
2022	2.549
2023	2.549
2024	2.549