| 12,115,009 | 64.89% | preserved and publicly accessible (bright) | |
| 2,494,285 | 13.36% | preserved but not publicly accessible (dark) | |
| 4,063,361 | 21.77% | no known independent preservation | |
| 18,672,655 | total |
| Release Type | Total Count | Coverage |
|---|---|---|
| article-journal | 15,818,928 |
|
| article | 2,837,870 |
|
| paper-conference | 15,857 |
|