Table 1.
Cycle | Data collection dates | Overall response rate (AAPOR RR2) |
---|---|---|
1 | October 25, 2011 – February 21, 2012 | 36.7% |
2 | October 9, 2012 – January 11, 2013 | 40.0% |
3 | September 6, 2013 – December 30, 2013 | 35.2% |
4 | August 20, 2014 – November 17, 2014 | 34.4% |