Year	Percent change
1980	2.622
1981	-1.397
1982	3.562
1983	-2.699
1984	3.402
1985	4.744
1986	6.665
1987	7.672
1988	8.444
1989	8.068
1990	5.042
1991	2.956
1992	1.767
1993	-3.319
1994	8.863
1995	7.523
1996	2.446
1997	7.976
1998	11.9
1999	6.951
2000	15.353
2001	2.382
2002	1.946
2003	0.894
2004	6.204
2005	6.32
2006	5.601
2007	5.756
2008	1.295
2009	-9.355
2010	8.893
2011	5.837
2012	0.2
2013	2.418
2014	4.899
2015	5.898
2016	3.044
2017	3.967
2018	1.164
2019	2.534
2020	2.66
2021	3.454
2022	4.053
2023	4.529
2024	4.592