Year	Percent change (Units)
2001	10.268
2002	0.183
2003	-1.090
2004	-5.252
2005	7.455
2006	6.243
2007	10.123
2008	12.196
2009	-18.873
2010	10.977
2011	-4.271
2012	-7.802
2013	-14.978
2014	6.580
2015	6.278
2016	12.826
2017	12.510
2018	4.083
2019	-6.643
2020	-7.603
2021	9.297
2022	24.413
2023	15.402
2024	-6.628
2025	1.946
2026	2.180
2027	2.600
2028	2.600
2029	2.500