Table 4. The number articles acknowledging the use of citizen science data from past projects grouped by topic from 1997 to 2014.
| Topic | 1997–1999 | 2000–2002 | 2003–2005 | 2006–2008 | 2009–2011 | 2012–2014 | Total |
|---|---|---|---|---|---|---|---|
| Astronomy | 0 | 0 | 0 | 0 | 1 | 4 | 5 |
| Environment | 0 | 0 | 0 | 0 | 0 | 3 | 3 |
| Biology | 0 | 0 | 2 | 1 | 14 | 52 | 69 |
| Medical | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Others | 0 | 0 | 0 | 0 | 0 | 1 | 1 |
| Total | 0 | 0 | 2 | 1 | 15 | 60 | 78 |
| Break-down of Biology Category | |||||||
| Avian | 0 | 0 | 1 | 1 | 5 | 25 | 32 |
| Marine | 0 | 0 | 0 | 0 | 2 | 4 | 6 |
| Terrestrial invertebrates | 0 | 0 | 1 | 0 | 4 | 14 | 19 |
| Herpetology | 0 | 0 | 0 | 0 | 0 | 2 | 2 |
| Plants | 0 | 0 | 0 | 0 | 2 | 4 | 6 |
| Mammals | 0 | 0 | 0 | 0 | 0 | 3 | 3 |
| Other Animals | 0 | 0 | 0 | 0 | 1 | 0 | 1 |