Monthly book distribution reports.
| 10,304,658 |
| 5,236,235 |
| 1 |
| 1985-12 |
| 7 | 1984-12 | 9,896,828 | 5,514,404 | 1 | 1984-12 |
| 8 | 1983-12 | 13,109,363 | 6,186,552 | 1 | 1983-12 |
| 9 | 1982-12 | 8,291,658 | 4,140,028 | 1 | 1982-12 |
| 10 | 1981-12 | 6,336,832 | 2,425,548 | 1 | 1981-12 |
| 11 | 1980-12 | 6,837,996 | 2,337,900 | 1 | 1980-12 |
| 12 | 1979-12 | 18,348,541 | 5,805,393 | 1 | 1979-12 |