Year	Percent change (Units)
1996	-7.974
1997	14.757
1998	8.638
1999	-11.618
2000	23.518
2001	-0.368
2002	13.909
2003	1.913
2004	-6.311
2005	-0.743
2006	-28.104
2007	-0.645
2008	-6.527
2009	14.811
2010	24.491
2011	30.338
2012	12.738
2013	-1.993
2014	-0.009
2015	4.807
2016	-1.877
2017	6.125
2018	-2.330
2019	0.982
2020	5.043
2021	19.168
2022	-11.100
2023	23.869
2024	1.921
2025	3.535
2026	3.671
2027	2.951
2028	2.614
2029	2.614