Year	Percent change (Units)
1993	1086.190
1994	180.683
1995	42.174
1996	31.947
1997	23.435
1998	10.457
1999	35.901
2000	19.688
2001	6.920
2002	2.134
2003	2.975
2004	4.111
2005	4.339
2006	5.552
2007	10.230
2008	24.520
2009	6.837
2010	7.968
2011	16.636
2012	2.768
2013	6.614
2014	7.534
2015	6.503
2016	0.389
2017	3.175
2018	1.543
2019	1.136
2020	6.323
2021	11.908
2022	13.910
2023	10.797
2024	6.687
2025	6.625
2026	5.536
2027	4.768
2028	4.000
2029	4.000