Year	Percent change (Units)
1998	7.520
1999	8.998
2000	2.203
2001	5.539
2002	0.315
2003	3.900
2004	4.565
2005	2.426
2006	3.826
2007	7.103
2008	-0.389
2009	-10.135
2010	-5.811
2011	-8.535
2012	-7.233
2013	-0.820
2014	-0.649
2015	2.691
2016	2.338
2017	0.254
2018	1.484
2019	2.032
2020	-6.812
2021	14.228
2022	5.037
2023	2.304
2024	1.300
2025	1.300
2026	1.300
2027	1.300
2028	1.300
2029	1.300