| Division of stage(year) | Reporting text | Comment text | Final exclusion article | Final use engineer | ||||
|---|---|---|---|---|---|---|---|---|
| Total article | Exclusion article | Use engineer | Total article | Exclusion article | Use engineer | |||
| Stage 1(1920-1945) | 9 | 3 | 7 | 11 | 2 | 9 | 123 | 639 |
| Stage 2(1946-1959) | 11 | 3 | 8 | 13 | 1 | 12 | ||
| Stage 3(1960-1969) | 32 | 11 | 21 | 33 | 5 | 28 | ||
| Stage 4(1970-1979) | 68 | 19 | 49 | 63 | 19 | 44 | ||
| Stage 5(1980-1989) | 112 | 23 | 89 | 91 | 18 | 73 | ||
| Stage 6(1990-1999) | 233 | 15 | 218 | 85 | 4 | 81 | ||
| Total | 465 | 74 | 392 | 296 | 49 | 247 | ||