Year	Percent change (Units)
1983	-1.843
1984	4.934
1985	-7.406
1986	12.158
1987	-6.400
1988	9.633
1989	7.100
1990	16.661
1991	7.537
1992	-3.318
1993	10.847
1994	6.400
1995	9.088
1996	5.658
1997	10.716
1998	3.952
1999	-10.908
2000	6.607
2001	-4.128
2002	-3.812
2003	-10.216
2004	13.286
2005	3.100
2006	-3.290
2007	-8.334
2008	-1.097
2009	-14.180
2010	-12.891
2011	4.597
2012	0.658
2013	-6.713
2014	-4.524
2015	-0.863
2016	-11.729
2017	-0.044
2018	-10.800
2019	-11.500
2020	-65.593
2021	-33.714
2022	25.409
2023	24.765
2024	11.016
2025	0.611