Year	Percent change (Units)
1996	5.898
1997	-1.510
1998	-6.366
1999	16.121
2000	19.083
2001	-3.691
2003	5.012
2004	13.377
2005	13.413
2006	7.284
2007	2.408
2008	5.247
2009	-12.810
2010	2.083
2011	9.226
2012	20.804
2013	-0.664
2014	-4.068
2015	-0.845
2016	-2.757
2017	3.690
2018	3.262
2019	0.381
2020	-2.548
2021	29.473
2022	-15.811
2023	10.812
2024	3.228
2025	2.078
2026	0.647
2027	0.502
2028	0.267
2029	0.267