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Number of samples by country and year of sampling in the final GAs occurrence data set
| Country/Year | 2005 | 2007 | 2015 | 2016 | 2017 | Total by country |
|---|---|---|---|---|---|---|
| Germany | 222 | 8 | 8 | 9 | 185 | 432 |
| Netherlands | – | – | 81 | 52 | – | 133 |
| Sweden | – | – | 35 | – | 4 | 39 |
| Total by year | 222 | 8 | 124 | 61 | 189 | 604 |
