Year	Percent change (Units)
1985	11.200
1986	6.600
1987	8.900
1988	27.900
1989	6.600
1990	4.300
1991	4.500
1992	8.800
1993	18.800
1994	25.500
1995	10.100
1996	7.000
1997	0.400
1998	-1.000
1999	-1.000
2000	1.905
2001	-0.471
2002	-0.410
2003	3.264
2004	2.409
2005	1.678
2006	2.888
2007	6.630
2008	1.222
2009	1.632
2010	4.530
2011	4.096
2012	2.448
2013	2.553
2014	1.542
2015	1.676
2016	2.102
2017	1.679
2018	1.779
2019	4.491
2020	0.180
2021	1.420
2022	1.824
2023	-0.261
2024	1.890
2025	2.018
2026	2.018
2027	2.018
2028	2.018
2029	2.018