Year	Percent change (Units)
1998	-0.679
1999	-1.365
2000	2.468
2001	6.916
2002	3.648
2003	-1.535
2004	-0.708
2005	1.773
2006	0.203
2007	3.392
2008	-7.646
2009	3.673
2010	5.422
2011	-0.053
2012	-1.309
2013	3.610
2014	-1.158
2015	2.101
2016	2.144
2017	3.734
2018	5.659
2019	10.358
2020	-2.846
2021	1.112
2022	-0.676
2023	3.000
2024	3.000
2025	2.000
2026	1.750
2027	1.500
2028	1.500
2029	1.500