From: Evaluating medical convenience in ethnic minority areas of Southwest China via road network vulnerability: a case study for Dehong autonomous prefecture
Year
Level
Number of settlements
Percentage
2009
A
87
22.5%
B
44
12%
C
49
13%
D
88
24%
E
106
28.5%
Total
374
2015
156
41.5%
52
13.8%
62
16.5%
63
16.8%
43
11.4%
376