Year	Percent change (Units)
1993	10154.969
1994	401.119
1995	181.651
1996	39.723
1997	10.117
1998	19.993
1999	19.215
2000	25.816
2001	6.122
2002	-0.569
2003	8.243
2004	12.309
2005	10.347
2006	11.625
2007	16.590
2008	22.311
2009	12.310
2010	9.096
2011	4.560
2012	-0.202
2013	0.496
2014	24.870
2015	43.313
2016	12.361
2017	13.669
2018	9.777
2019	4.054
2020	4.992
2021	10.015
2022	26.603
2023	5.084
2024	8.500
2025	7.001
2026	5.501
2027	5.001
2028	5.000
2029	5.000