| Years | PCV-2a single positive ratio | PCV-2b single positive ratio | PCV-2a/2b co-infected ratio | Total |
| 2009 | 7.69% (1/13) | 92.31% (12/13) | 0 (0/13) | 13 |
| 2010 | 3.57% (2/56) | 91.07% (51/56) | 5.36% (3/56) | 56 |
| 2011 | 0 (0/25) | 88.00% (22/25) | 12.00% (3/25) | 25 |
| Total | 3.19% (3/94) | 90.43% (85/94) | 6.38% (6/94) | 94 |