Year	Percent change
1981	3.108
1982	18.428
1983	1.792
1984	5.924
1985	-1.898
1986	2.362
1987	2.895
1988	2.293
1989	0.728
1990	6.048
1991	21.408
1992	14.495
1993	7.536
1994	42.351
1995	40.7
1996	8.743
1997	16.606
1998	-5.956
1999	1.967
2000	5.924
2001	-0.219
2002	6.165
2003	7.677
2004	10.25
2005	5.608
2006	12.138
2007	6.579
2008	22.323
2009	5.737
2010	0.227
2011	8.336
2012	3.885
2013	3.645
2014	2.114
2015	4.531
2016	7.284
2017	0.665
2018	1.135
2019	5
2020	5
2021	5
2022	5
2023	5
2024	5