Year	Percent change (Units)
1999	33.071
2000	27.022
2001	3.424
2002	-4.257
2003	16.726
2004	17.797
2005	7.693
2006	31.181
2007	-32.605
2008	9.739
2009	0.951
2010	21.551
2011	10.834
2012	0.101
2013	11.410
2014	4.383
2015	5.400
2016	9.902
2017	15.991
2018	6.251
2019	-2.117
2020	-5.494
2021	17.131
2022	6.907
2023	2.151
2024	6.525
2025	8.346
2026	6.166
2027	4.700
2028	3.977
2029	3.803