Table 1.

Composition of the 2003, 2004 and 2005 ATUS Databases

	ATUS Sample N	Responder in Database N (%)	Female (%)	Mon–Fri N	Sat+Sun N
2003	40,500	20,720 (51.2%)	56.3%	10,223	10,497
2004	26,328	13,973 (53.1%)	56.2%	6,950	7,023
2005	26,328	13,038 (49.5%)	57.1%	6,544	6,494
All	93,156	47,731 (51.2%)	56.5%	23,717	24,014