Year	Units
1996-01-01	3620.50
1997-01-01	4189.25
1998-01-01	5545.75
1999-01-01	5933.50
2000-01-01	6301.75
2001-01-01	6189.75
2002-01-01	6822.75
2003-01-01	6781.75
2004-01-01	8067.00
2005-01-01	8211.25
2006-01-01	7547.50
2007-01-01	10412.25
2008-01-01	9595.00
2009-01-01	9618.25
2010-01-01	9110.50
2011-01-01	7157.50
2012-01-01	7366.75
2013-01-01	6311.50