| 先秦 | 秦汉 | 魏晋南北朝 | 隋唐五代 | 宋辽金 | 元明 | 清 | |
| 北 | 87% | 76% | 61% | 68% | 50% | 29% | 26% |
| 南 | 13% | 24% | 39% | 32% | 50% | 71% | 74% |
