Response rate				n			Sampling error
Sample group	Card	No card	Difference	p	Card	No card		Card	No card	Diff	z
All sample	56.5	56.7	-0.2	.884	3906	3911		0.87	0.87	1.23	0.146
ANES Rs	83.4	83.3	0.1	.945	1970	1977		0.71	0.71	1.01	0.069
ANES NRs	33.5	33.5	0.0	.980	1936	1933		1.38	1.37	1.94	0.025