| 目测估计含量 | 5% | 10% | 15% | 20% | 25% | 30% | 35% | 40%及以上 |
| 人数百分比 | 1.32% | 15.79% | 28.95% | 34.21% | 15.79% | 2.63% | 0 | 1.31% |
| 面积分析法分析结果 | 20.93% | 目测估计均值 | 18.09% | |||||