Sphaerium
| Year | Arter/grupper | Localities | Participants | Observations |
|---|---|---|---|---|
| 2014 | 1 | 1 | 1 | 2 |
| 2013 | 1 | 1 | 1 | 1 |
| 2012 | 1 | 1 | 1 | 1 |
| 2011 | 1 | 1 | 1 | 1 |
| 2005 | 1 | 1 | 1 | 1 |
| 2002 | 1 | 3 | 4 | 4 |
| 1996 | 1 | 4 | 3 | 4 |
| 1995 | 1 | 2 | 2 | 2 |
| 1993 | 2 | 4 | 4 | 4 |
| 1992 | 3 | 2 | 2 | 4 |
| 1991 | 1 | 1 | 1 | 1 |
| 1990 | 2 | 5 | 5 | 6 |
| 1989 | 2 | 8 | 8 | 8 |
| Totalt alle år | 4 | 27 | 28 | 39 |