Year	Percent change
1980	12.504
1981	4.967
1982	9.918
1983	12.137
1984	13.046
1985	8.001
1986	5.177
1987	7.044
1988	8.183
1989	8.864
1990	9.408
1991	10.345
1992	8.144
1993	9.595
1994	9.497
1995	7.084
1996	8.779
1997	8.551
1998	7.591
1999	9.058
2000	7.183
2001	3.724
2002	2.939
2003	2.472
2004	3.346
2005	4.771
2006	5.152
2007	5.08
2008	6.783
2009	6.265
2010	5.726
2011	7.276
2012	9.273
2013	11.32
2014	9.536
2015	7.625
2016	7.642
2017	5.542
2018	3.647
2019	3.987
2020	4.531
2021	4.652
2022	4.764
2023	4.719
2024	4.476