Year	Percent change
1980	11.463
1981	14.576
1982	5.404
1983	-0.683
1984	5.699
1985	-0.863
1986	5.707
1987	2.872
1988	2.241
1989	-10.402
1990	1.162
1991	2.406
1992	13.322
1993	2.699
1994	4.828
1995	6.648
1996	1.263
1997	4.051
1998	2.877
1999	2.509
2000	4.303
2001	4.713
2002	6.283
2003	3.989
2004	7.987
2005	7.561
2006	6.36
2007	8.176
2008	7.232
2009	5.477
2010	2.311
2011	2.587
2012	2.65
2013	2.829
2014	3.098
2015	2.353
2016	2.044
2017	2.116
2018	2
2019	2.2
2020	2.4
2021	2.6
2022	2.8
2023	3
2024	3