Response rates
	Total cell sample	Prepaid cell	Non-prepaid cell
	%	%	%
Contact	61.4	67.2	60.4
Cooperation	15.6	13.8	16.0
e1	60.2	78.5	57.5
Response rate (RR3)	9.6	9.2	9.7
Unweighted sample size	23,120	2,871	20,249
Survey conducted February 18–22, 2015. PEW RESEARCH CENTER