0 1 2 3 Fri 11 Feb 1977 Tue 01 Mar 1977 Fri 01 Apr 1977 Sun 01 May 1977 Thu 12 May 1977 Hours Slept Hours Slept Rolling Average Total Time in Bed Total Rolling Average <- Previous Period Next Period -> Date Range: to Offset: hours Data: Hours Slept Hours Laying Awake Total Time in Bed Total Dreams Show: Raw Data Rolling Average Rolling Average: Start from Zero Events: None Major All