| Year | Brand 1 | Brand 2 | Brand 3 | Brand 4 |
| 2011 | 74% | 45% | 13% | 18% |
| 2012 | 82% | 42% | 14% | 21% |
| 2013 | 80% | 50% | 20% | 18% |
| 2014 | 74% | 46% | 24% | 21% |
| 2015 | 73% | 36% | 20% | 16% |
| 2016 | 72% | 36% | 24% | 14% |
| 2017 | 74% | 34% | 24% | 13% |
| 2018 | 70% | 35% | 40% | 18% |
| 2019 | 70% | 32% | 35% | 17% |
| 2020 | 66% | 31% | 41% | 16% |
| Year | Brand 1 | Brand 2 | Brand 3 | Brand 4 |
| 2011 | 74% | 45% | 13% | 18% |
| 2012 | 82% | 42% | 14% | 21% |
| 2013 | 80% | 50% | 20% | 18% |
| 2014 | 74% | 46% | 24% | 21% |
| 2015 | 73% | 36% | 20% | 16% |
| 2016 | 72% | 36% | 24% | 14% |
| 2017 | 74% | 34% | 24% | 13% |
| 2018 | 70% | 35% | 40% | 18% |
| 2019 | 70% | 32% | 35% | 17% |
| 2020 | 66% | 31% | 41% | 16% |