Year	Percent change (Units)
2000	4.993
2001	16.351
2002	19.334
2003	35.760
2004	31.677
2005	31.616
2006	64.826
2007	4.671
2008	6.752
2009	-4.413
2010	3.312
2011	6.020
2012	3.614
2013	3.132
2014	1.587
2015	2.310
2016	-0.670
2017	0.771
2018	-0.096
2019	0.096
2020	3.155
2021	5.283
2022	4.313
2023	3.966
2024	4.000
2025	4.000
2026	3.800
2027	3.700
2028	3.600
2029	3.500