Year	Percent change
1981	-6.062
1982	0.041
1983	3.918
1984	5.307
1985	6.459
1986	4.248
1987	3.695
1988	6.34
1989	8.425
1990	5.014
1991	5.406
1992	2.017
1993	0.685
1994	10.6
1995	11.903
1996	5.124
1997	9.912
1998	8.001
1999	8.979
2000	12.662
2001	1.51
2002	-0.455
2003	3.041
2004	8.613
2005	5.828
2006	9.396
2007	5.364
2008	1.401
2009	-10.665
2010	10.284
2011	3.66
2012	2.406
2013	1.304
2014	3.333
2015	7.608
2016	5.426
2017	5.72
2018	3.389
2019	4
2020	4
2021	4
2022	4
2023	4
2024	4