Windows Sales, 1985-Present

Sales in units

11/01/1985 - 04/01/1987
11/01/1985 - 01/31/1990
01/01/1988 - 12/31/1988
05/01/1990 - 04/30/1991
04/01/1992 - 06/30/1992
08/24/1995 - 08/23/1996
06/25/1998 - 06/28/1998
02/17/2000 - 03/16/2000
09/14/2000 - 09/16/2000
10/25/2001 - 12/25/2001
10/25/01 - 10/27/01
01/31/2007 - 02/28/2007
10/22/2009 - 04/22/2010
10/22/2009 - 06/01/2010
10/22/2009 - 10/22/2011
10/26/2012 - 04/26/2013
10/26/2012 - 12/26/2012