Year	Percent change
1980	15.071
1981	20.68
1982	21.127
1983	20.155
1984	9.677
1985	5.882
1986	11.111
1987	3.75
1988	3.614
1989	4.651
1990	11.111
1991	7.587
1992	13.429
1993	5.828
1994	3.344
1995	8.41
1996	6.01
1997	8.574
1998	4.399
1999	4.344
2000	-2.403
2001	3.674
2002	1.918
2003	1.188
2004	-1.891
2005	0.434
2006	4.842
2007	4.394
2008	6.793
2009	0.99
2010	2.079
2011	4.474
2012	2.543
2013	1.512
2014	-0.244
2015	0.127
2016	-1.408
2017	0.784
2018	1.302
2019	1.576
2020	2
2021	2
2022	2
2023	2
2024	2