Year	Percent change (Units)
2004	2.014
2005	3.489
2006	5.260
2007	2.627
2008	14.669
2009	0.480
2010	1.770
2011	5.352
2012	4.340
2013	1.851
2014	1.098
2015	-2.237
2016	-1.507
2017	0.050
2018	0.802
2019	-0.110
2020	-0.658
2021	2.247
2022	3.234
2023	6.753
2024	4.250
2025	2.296
2026	2.000
2027	2.000
2028	2.000
2029	2.000