| Year | Viewership |
|---|---|
| 2008 | 9,934,000 |
| 2009 | 8,927,000 |
| 2010 | 8,091,000 |
| 2011 | 8,150,000 |
| 2012 | 8,426,000 |
| 2013 | 8,407,000 |
| 2014 | 8,595,000 |
| 2015 | 9,257,000 |
| 2016 | 10,556,000 |
- Report
|
Numbers, Facts and Trends Shaping Your World
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