Year	Percent change (Units)
2004	2.371
2005	6.181
2006	2.575
2007	4.327
2008	16.614
2009	-5.825
2010	5.237
2011	6.324
2012	2.906
2013	0.768
2014	1.289
2015	-3.843
2016	-0.779
2017	1.036
2018	0.676
2019	-1.658
2020	1.541
2021	2.221
2022	5.746
2023	6.000
2024	2.600
2025	2.000
2026	2.000
2027	2.000
2028	2.000
2029	2.000