Table 2 The geographical distribution of each subtype in diverse regions in Chinese Mainland
Subtype | Region, % | ||||||
|---|---|---|---|---|---|---|---|
| Â | North | Northwest | Northeast | Central | East | Southwest | South |
1b | 15.1 | 10.0 | 13.1 | 17.9 | 21.4 | 12.8 | 9.7 |
2a | 19.8 | 15.7 | 27.0 | 16.5 | 12.9 | 5.2 | 3.0 |
3a | 2.9 | 13.4 | 5.9 | 2.4 | 13.7 | 38.5 | 23.1 |
3b | 3.7 | 5.6 | 11.9 | 2.0 | 12.6 | 46.8 | 17.4 |
6a | 1.7 | 1.6 | 4.0 | 2.9 | 8.3 | 21.5 | 60.0 |
6 others | 0.5 | 3.1 | 3.1 | 0.5 | 10.4 | 72.5 | 9.8 |