Year	Percent change
1980	18.361
1981	26.731
1982	-1.202
1983	4.812
1984	3.166
1985	0.921
1986	8.011
1987	17.687
1988	5.896
1989	7.86
1990	4.324
1991	5.626
1992	5.142
1993	1.747
1994	2.661
1995	1.672
1996	-0.082
1997	5.103
1998	4.386
1999	0
2000	4.116
2001	2.314
2002	2.262
2003	2.949
2004	0.806
2005	1.865
2006	1.918
2007	4.106
2008	5.834
2009	2.427
2010	3.291
2011	1.197
2012	0.798
2013	1.511
2014	1.063
2015	1.473
2016	2.142
2017	3.315
2018	2.637
2019	2.636
2020	2.182
2021	2.182
2022	2.182
2023	2.182
2024	2.182