| 参考指标 | 2类 | 3类 | 4类 | 5类 | 6类 |
| AIC | 67030.175 | 66195.991 | 65560.408 | 64724.484 | 64784.279 |
| BIC | 67108.477 | 66304.409 | 65698.942 | 64923.251 | 64984.930 |
| Entropy | 0.604 | 0.661 | 0.697 | 0.748 | 0.759 |
| LMRT | 1114.813*** | 823.652*** | 629.882 | 571.873*** | 263.233 |