Year	Percent change
1980	0
1981	0
1982	0
1987	0
1989	2.584
1990	-2.965
1991	2.348
1992	33.524
1993	9.139
1994	4.602
1995	6.507
1996	16.879
1997	28.135
1998	-4.455
1999	-10.354
2000	21.248
2001	18.57
2002	12.092
2003	-15.828
2004	-2.105
2005	10.5
2006	19.237
2007	11.06
2008	4.034
2009	-5.536
2010	3.347
2011	8.561
2012	-2.285
2013	-8.464
2014	-3.906
2015	11.554
2016	7.765
2017	6.218
2018	9.172
2019	4.014
2020	4.434
2021	2.708
2022	4.417
2023	5.548
2024	3.694