Phylum: Green algae (Chlorophyta)
| Year | Arter/grupper | Localities | Participants | Observations |
|---|
| 2024 | 3 | 3 | 3 | 8 |
| 2023 | 4 | 2 | 2 | 15 |
| 2022 | 6 | 5 | 5 | 23 |
| 2021 | 6 | 6 | 6 | 50 |
| 2020 | 6 | 11 | 8 | 60 |
| 2019 | 6 | 16 | 11 | 82 |
| 2018 | 8 | 12 | 10 | 66 |
| 2017 | 6 | 12 | 10 | 51 |
| 2016 | 7 | 15 | 13 | 102 |
| 2015 | 8 | 15 | 12 | 99 |
| 2014 | 7 | 21 | 15 | 59 |
| 2013 | 6 | 13 | 11 | 39 |
| 2012 | 4 | 3 | 3 | 16 |
| 2011 | 1 | 1 | 1 | 10 |
| 2010 | 5 | 5 | 5 | 15 |
| 2009 | 3 | 4 | 4 | 34 |
| 2008 | 7 | 9 | 7 | 48 |
| 2007 | 8 | 10 | 8 | 55 |
| 2006 | 5 | 7 | 6 | 35 |
| 2005 | 6 | 13 | 10 | 86 |
| 2004 | 8 | 16 | 18 | 101 |
| 2003 | 8 | 11 | 10 | 131 |
| 2002 | 5 | 16 | 18 | 89 |
| 2001 | 6 | 21 | 18 | 131 |
| 2000 | 6 | 27 | 26 | 225 |
| 1999 | 8 | 34 | 31 | 268 |
| 1998 | 6 | 60 | 58 | 600 |
| 1997 | 6 | 97 | 91 | 1027 |
| 1996 | 35 | 173 | 168 | 1848 |
| 1995 | 1 | 197 | 182 | 2259 |
| 1994 | 73 | 294 | 277 | 2993 |
| 1993 | 81 | 324 | 303 | 3371 |
| 1992 | 9 | 4 | 4 | 12 |
| 1991 | 93 | 52 | 52 | 287 |
| 1990 | 140 | 69 | 70 | 550 |
| 1989 | 119 | 80 | 83 | 430 |
| Totalt alle år | 259 | 668 | 580 | 15275 |