Year	Percent change
1980	0.953
1981	1.776
1982	-1.392
1983	5.772
1984	18.623
1985	4.481
1986	4.494
1987	3.186
1988	9.096
1989	0.839
1990	4.522
1991	1.604
1992	7.422
1993	10.82
1994	12.829
1995	8.871
1996	5.726
1997	8.59
1998	9.517
1999	10.822
2000	9.046
2001	-2.969
2002	1.19
2003	-1.727
2004	5.532
2005	2.22
2006	0.868
2007	1.143
2008	-4.544
2009	-12.967
2010	6.639
2011	4.766
2012	2.766
2013	2.386
2014	6.232
2015	3.368
2016	1.325
2017	1.117
2018	3.293
2019	2.601
2020	2.684
2021	2.265
2022	2.213
2023	1.75
2024	2.294