
| Upper bound of category | Frequency | Frequency % | Cummulative frequency % |
| 87.1 | 1 | 0.4 | 0.4 |
| 92.0 | 0 | 0.0 | 0.4 |
| 97.0 | 0 | 0.0 | 0.4 |
| 101.9 | 0 | 0.0 | 0.4 |
| 106.9 | 1 | 0.4 | 0.8 |
| 111.8 | 2 | 0.8 | 1.6 |
| 116.8 | 9 | 3.6 | 5.2 |
| 121.7 | 5 | 2.0 | 7.1 |
| 126.7 | 10 | 4.0 | 11.1 |
| 131.6 | 11 | 4.4 | 15.5 |
| 136.6 | 8 | 3.2 | 18.7 |
| 141.6 | 9 | 3.6 | 22.2 |
| 146.5 | 5 | 2.0 | 24.2 |
| 151.5 | 11 | 4.4 | 28.6 |
| 156.4 | 13 | 5.2 | 33.7 |
| 161.4 | 12 | 4.8 | 38.5 |
| 166.3 | 8 | 3.2 | 41.7 |
| 171.3 | 9 | 3.6 | 45.2 |
| 176.2 | 14 | 5.6 | 50.8 |
| 181.2 | 16 | 6.3 | 57.1 |
| 186.1 | 11 | 4.4 | 61.5 |
| 191.1 | 7 | 2.8 | 64.3 |
| 196.0 | 9 | 3.6 | 67.9 |
| 201.0 | 12 | 4.8 | 72.6 |
| 205.9 | 8 | 3.2 | 75.8 |
| 210.9 | 6 | 2.4 | 78.2 |
| 215.9 | 9 | 3.6 | 81.7 |
| 220.8 | 6 | 2.4 | 84.1 |
| 225.8 | 8 | 3.2 | 87.3 |
| 230.7 | 6 | 2.4 | 89.7 |
| 235.7 | 4 | 1.6 | 91.3 |
| 240.6 | 3 | 1.2 | 92.5 |
| 245.6 | 3 | 1.2 | 93.7 |
| 250.5 | 3 | 1.2 | 94.8 |
| 255.5 | 4 | 1.6 | 96.4 |
| 260.4 | 0 | 0.0 | 96.4 |
| 265.4 | 1 | 0.4 | 96.8 |
| 270.3 | 2 | 0.8 | 97.6 |
| 275.3 | 1 | 0.4 | 98.0 |
| 280.2 | 2 | 0.8 | 98.8 |
| 285.2 | 1 | 0.4 | 99.2 |
| 290.2 | 0 | 0.0 | 99.2 |
| 295.1 | 0 | 0.0 | 99.2 |
| 300.1 | 0 | 0.0 | 99.2 |
| 305.0 | 0 | 0.0 | 99.2 |
| 310.0 | 1 | 0.4 | 99.6 |
| 314.9 | 0 | 0.0 | 99.6 |
| 319.9 | 0 | 0.0 | 99.6 |
| 324.8 | 0 | 0.0 | 99.6 |
| 329.8 | 1 | 0.4 | 100.0 |