| Material | Stigma exsertion rate (%) | Degree of exposure (%) | Fullness | Overview | ||||||
| 2007 | 2008 | Mean Value | 2007 | 2008 | Mean Value | 2007 | 2008 | Mean Value | ||
| 206083 | 86.07 | 85.31 | 85.69 | 100 | 100 | 100 | high | high | high | good |
| 1066A | 77.56 | 78.90 | 78.23 | 75 | 83 | 79 | high | high | high | good |
| Datong 27 | 77.46 | 77.67 | 77.57 | 100 | 100 | 100 | medium | medium | medium | good |
| Datong 29 | 68.64 | 69.01 | 68.83 | 100 | 100 | 100 | medium | medium | medium | good |