| 目测估计含量 | 30% | 35% | 40% | 45% | 50% | 55% | 60% | 65%及以上 |
| 人数百分比 | 1.32% | 11.84% | 22.37% | 23.68% | 22.37% | 7.89% | 3.95% | 6.58% |
| 面积分析法分析结果 | 52.85% | 目测估计均值 | 46.32% | |||||