Year	Percent change
1980	-34.759
1981	8.216
1982	-25.206
1983	-13.157
1984	24.238
1985	20.773
1986	8.944
1987	7.734
1988	-0.176
1989	0.322
1990	10.243
1991	12.589
1992	9.924
1993	-0.728
1994	-0.645
1995	8.92
1996	7.94
1997	13.539
1998	0
1999	-10.65
2000	6.143
2001	-7.085
2002	10.405
2003	-0.638
2004	11.534
2005	11.764
2006	13.377
2007	18.098
2008	20.168
2009	-5.528
2010	8.836
2011	27.017
2012	8.536
2013	15.81
2014	12.614
2015	-3.395
2016	-8.464
2017	4.387
2018	4.143
2019	8.086
2020	5.809
2021	5.587
2022	5.947
2023	6.157
2024	6.566