Annual Units
1992-01-01 4424.25
1993-01-01 4714.25
1994-01-01 4990.00
1995-01-01 5768.00
1996-01-01 7377.50
1997-01-01 7440.50
1998-01-01 9989.50
1999-01-01 15948.75
2000-01-01 18457.00
2001-01-01 15182.25
2002-01-01 12763.75
2003-01-01 12401.25
2004-01-01 17394.00
2005-01-01 18912.50
2006-01-01 15002.00
2007-01-01 15707.00
2008-01-01 11951.50
2009-01-01 6703.50
2010-01-01 2901.00
2011-01-01 2274.50
2012-01-01 1347.25
2013-01-01 1500.50
2014-01-01 1656.50
2015-01-01 2562.50
2016-01-01 3120.25
2017-01-01 3860.00
