Table 6.
Mean number of distinct residue detections per pollen sample by year, aggregated across all locations.
| Year | Mean # Detections/(Pooled Sample) | Standard Deviation |
|---|---|---|
| 2009 | 3.6 | 2.20 |
| 2010 | 3.6 | 2.06 |
| 2011 | 4.4 | 3.06 |
| 2012 | 4.7 | 3.20 |
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