Distribution of person-years by age and calendar year for the cohort of 332 graphite electrode workers, 1951–88
| Calendar year | |||||
|---|---|---|---|---|---|
| Age | 1951–58 | 1959–68 | 1969–78 | 1979–88 | Total |
| 20–29 | 38.8 | 134.6 | 146.9 | 1.2 | 321.5 |
| 30–39 | 123.1 | 474.1 | 651.7 | 187.9 | 1436.8 |
| 40–49 | 205.3 | 547.1 | 1081.1 | 665.4 | 2498.9 |
| 50–59 | 55.1 | 388.0 | 782.0 | 1056.3 | 2281.4 |
| 60–69 | – | 65.7 | 358.7 | 710.5 | 1134.9 |
| 70– | – | – | 53.4 | 316.1 | 369.5 |
| Total person-years | 422.3 | 1609.5 | 3073.9 | 2937.4 | 8043.0 |
| Number of workers | 72 | 283 | 314 | 296 | |