0 1 2 3 Thu 10 Jan 1980 Fri 01 Feb 1980 Sat 01 Mar 1980 Tue 01 Apr 1980 Thu 01 May 1980 Sun 01 Jun 1980 Tue 01 Jul 1980 Fri 01 Aug 1980 Mon 01 Sep 1980 Wed 01 Oct 1980 Sat 01 Nov 1980 Mon 01 Dec 1980 Thu 01 Jan 1981 Thu 08 Jan 1981 Hours Slept Hours Slept Rolling Average Total Time in Bed Total Rolling Average
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