Year	Percent change
1980	7.195
1981	6.438
1982	12.613
1983	6.629
1984	5.359
1985	1.729
1986	-1.1
1987	4.146
1988	2.913
1989	1.038
1990	4.202
1991	19.6
1992	9.5
1993	12.468
1994	20.996
1995	55.967
1996	13.193
1997	11.755
1998	6.462
1999	-2.419
2000	3.908
2001	3.359
2002	1.981
2003	7.445
2004	11.98
2005	9.122
2006	8.831
2007	9.081
2008	15.44
2009	10.347
2010	2.306
2011	5.668
2012	6.286
2013	4.223
2014	1.784
2015	2.507
2016	5.723
2017	4.837
2018	1.364
2019	3.508
2020	5
2021	5
2022	5
2023	5
2024	5