Year	Percent change
1980	-38.309
1981	122.65
1982	72.791
1983	8.355
1984	-5.498
1985	46.863
1986	-8.151
1987	-11.745
1988	28.826
1989	14.879
1990	34.794
1991	17.5
1992	37.3
1993	81.4
1994	24.9
1995	4.3
1996	2.601
1997	-1.416
1998	6.4
1999	1.504
2000	7.193
2001	-17.197
2002	-10.829
2003	-1.57
2004	4.621
2005	14.064
2006	20.741
2007	5.173
2008	15.36
2009	6.9
2010	16.547
2011	27.348
2012	8.019
2013	8.252
2014	27.331
2015	-6.595
2016	10.762
2017	5.378
2018	10.913
2019	7.431
2020	4.273
2021	13.358
2022	2.638
2023	7.286
2024	7.248