Unweighted demographic percentages for waves 1 to 11
| Sample size | Male | Female | 18–24 | 25–34 | 35–44 | 45–55 | High school or less | Some college | College graduate | |
| Telephone | ||||||||||
| Wave 1 | 905 | 49.9 | 50.1 | 17.9 | 27.4 | 28.6 | 26.1 | 28.5 | 38.2 | 33.3 |
| Wave 2 | 906 | 50.2 | 49.8 | 17.7 | 28.4 | 27.7 | 26.2 | 27.4 | 34.9 | 37.7 |
| Wave 3 | 911 | 50.2 | 49.8 | 17.9 | 27.2 | 29.4 | 25.5 | 29.4 | 38.0 | 32.6 |
| Wave 4 | 1799 | 50.9 | 49.1 | 18.4 | 28.0 | 27.4 | 26.2 | 27.2 | 35.7 | 37.1 |
| Wave 5 | 1797 | 50.7 | 49.3 | 18.0 | 27.7 | 28.5 | 25.8 | 29.6 | 36.4 | 34.0 |
| Web-panel | ||||||||||
| Wave 6 | 1975 | 42.1 | 57.9 | 5.4 | 17.5 | 32.5 | 44.7 | 15.4 | 42.4 | 42.2 |
| Wave 7 | 2440 | 38.8 | 61.2 | 5.7 | 18.5 | 31.0 | 44.8 | 15.4 | 42.2 | 42.4 |
| Wave 8 | 1966 | 39.3 | 60.7 | 4.7 | 16.7 | 29.2 | 49.4 | 15.4 | 41.4 | 43.2 |
| Wave 9 | 1760 | 39.0 | 61.0 | 5.9 | 15.4 | 31.1 | 47.6 | 15.2 | 38.6 | 46.2 |
| Wave 10 | 1239 | 41.5 | 58.5 | 5.4 | 14.3 | 29.5 | 50.8 | 14.5 | 38.5 | 47.0 |
| Wave 11 | 1028 | 41.4 | 58.6 | 5.0 | 13.7 | 30.5 | 50.8 | 11.9 | 38.4 | 49.7 |
The telephone sample included quotas based on gender, age and smoking status, while the web-based survey included quotas resulting in slightly oversampling smokers.