Table 1.
Number of posts selected for analysis.
| Year of post | Random sample of posts (n=4437), n | Posts containing an image (n=1553), n | Posts eligible for analysis (n=1303), n |
| 2012 | 570 | 12 | 12 |
| 2014 | 1,196 | 289 | 246 |
| 2016 | 1,378 | 658 | 540 |
| 2018 | 1,293 | 594 | 505 |
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