Year	Percent change (Units)
1980	13.329
1981	6.500
1982	15.211
1983	9.210
1984	6.055
1985	8.382
1986	-11.289
1987	3.300
1988	0.290
1989	4.440
1990	-7.390
1991	1.700
1992	-1.400
1993	2.000
1994	25.300
1995	3.150
1996	2.400
1997	1.500
1998	1.200
1999	1.100
2000	5.900
2001	5.571
2002	3.578
2003	3.713
2004	4.496
2005	3.007
2006	3.389
2007	4.486
2008	4.816
2009	4.789
2010	3.899
2011	2.231
2012	5.910
2013	0.416
2014	-0.008
2015	0.941
2016	0.802
2017	0.092
2018	1.702
2019	3.701
2020	0.800
2021	-0.015
2022	12.444
2023	8.482
2024	1.957
2025	2.232
2026	2.076
2027	1.928
2028	1.928
2029	1.928