Year	Percent change
1980	39.683
1981	5.42
1982	4.474
1983	-3.43
1984	9.493
1985	10.818
1986	4.721
1987	-27.445
1988	-10.147
1989	17.943
1990	18.561
1991	3.529
1992	25.59
1993	5.362
1994	28.764
1995	9.677
1996	13.201
1997	14.007
1998	14.825
1999	9.977
2000	5.495
2001	13.312
2002	5.651
2003	12.237
2004	7.982
2005	-31.613
2006	50.162
2007	79.117
2008	14.929
2009	-6.617
2010	9.116
2011	31.098
2012	2.292
2013	19.585
2014	14.909
2015	4.548
2016	2.111
2017	3.16
2018	15.555
2019	6.741
2020	6.226
2021	5.786
2022	5.474
2023	5.484
2024	5.612