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Annual proportions of H1N1pdm viruses among swine influenza A viruses subtyped in France from 2009 to 2017
| Yr | No. of swIAVs subtyped | No. of H1N1pdm viruses | Proportion of H1N1pdm viruses (%) |
|---|---|---|---|
| 2009 | 15 | 0 | 0 |
| 2010 | 53 | 4 | 7.55 |
| 2011 | 134 | 1 | 0.75 |
| 2012 | 134 | 2 | 1.49 |
| 2013 | 126 | 3 | 2.38 |
| 2014 | 103 | 3 | 2.91 |
| 2015 | 146 | 8 | 5.48 |
| 2016 | 172 | 21 | 12.21 |
| 2017 | 133 | 2 | 1.50 |
| Total | 1,016 | 44 | 4.33 |
