Year	Percent change (Units)
1998	50.678
1999	9.672
2000	-1.144
2001	-20.926
2002	60.138
2003	24.111
2004	3.068
2005	9.982
2006	24.801
2007	34.227
2008	14.362
2009	-0.121
2010	6.500
2011	3.017
2012	4.116
2013	6.934
2014	3.598
2015	13.591
2016	3.877
2017	3.403
2018	8.588
2019	9.511
2020	2.034
2021	7.277
2022	31.448
2023	20.000
2024	8.000
2025	7.800
2026	7.800
2027	7.800
2028	7.800
2029	7.800