Year	Percent change
1981	6.967
1982	16.21
1983	7.997
1984	23.869
1985	8.362
1986	-5.579
1987	17.98
1988	-6.403
1989	-10.3
1990	-19.576
1991	0
1992	0
1993	0
1994	-14.793
1995	9.975
1996	2.975
1997	18.423
1998	9.857
1999	18.393
2000	-17.897
2001	-1.242
2002	10.612
2003	1.828
2004	32.521
2005	41.062
2006	15.737
2007	10.974
2008	12.096
2009	11
2010	11.323
2011	12.198
2012	9.294
2013	10.575
2014	17.905
2015	32.461
2016	12.627
2017	-5.411
2018	-8.108
2019	6.227
2020	5.626
2021	2.192
2022	3.944
2023	7.13
2024	7.176