| Year | Month | Week |
|---|---|---|
| 2007 | 20% | 12% |
| 2008 | 21% | 13% |
| 2009 | 27% | 17% |
| 2010 | 27% | 17% |
| 2011 | 34% | 22% |
| 2012 | 39% | 29% |
| 2013 | 45% | 33% |
| 2014 | 47% | 36% |
| 2015 | 53% | 44% |
| 2016 | 57% | 50% |
| 2017 | 61% | 53% |
| 2018 | 64% | 57% |
| 2019 | 67% | 60% |
| 2020 | 68% | 60% |
| 2021 | 68% | 62% |
- Report
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Numbers, Facts and Trends Shaping Your World
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