| Biological control | |
| Year | Number of places where larvivorous fishes introduced |
| 2006 | 260 |
| 2007 | 792 |
| 2008 | 1040 |
| 2009 | 511 |
| 2010 | 837 |
| 2011 | 625 |
| 2012 | 629 |
| 2013 | 450 |
| 2014 | 1340 |
| 2015 | 2700 |