Table 1.

Number of individuals used for averages in Figure 4D, using a five-hour bin size

	1 to 5 hours	5 to 10 hours	10 to 15 hours	15 to 20 hours	20 to 25 hours	25 to 30 hours	30 to 35 hours
Anterior	2	3	7	5	3	4	4
Center	5	5	7	4	5	4	3
Posterior	2	3	4	8	4	5	4