Mode Final Sample Size
(% complete by Web)
Adjusted Response
Rate (AAPOR-RR3)
2006
 Telephone 1,013 30.0
 Mail 389 31.9
 Web+Mail 339 (28%) 22.4
2008
 Telephone 1,026 31.4
 Mail 327 35.5
 Web+Mail 469 (32%) 25.7
2010
 Mail 411 40.9
 Web+Mail 761 (28%) 37.8
 Web+Mail Choice 736 (17%) 36.4