Year	Percent change (Units)
1993	0.852
1994	-17.475
1995	16.005
1996	6.800
1997	25.100
1998	-4.601
1999	-3.874
2000	-3.873
2001	11.948
2002	18.138
2003	11.646
2004	5.276
2005	5.229
2006	8.236
2007	6.074
2008	3.837
2009	-20.369
2010	-3.015
2011	2.524
2012	-2.353
2013	3.285
2014	3.431
2015	9.273
2016	6.514
2017	8.482
2018	7.424
2019	6.682
2020	-12.316
2021	17.265
2022	26.496
2023	-5.299
2024	1.905
2025	2.583
2026	2.583
2027	2.750
2028	2.833
2029	2.917