Average of 10 fastest women's marathon times by country so far this year:
world 2:16:01
ETH 2:17:11
KEN 2:17:37
JPN 2:23:19
USA 2:23:59
MAR 2:26:55
CHN 2:27:30
GBR 2:27:40
AUS 2:29:24
GER 2:30:25
ESP 2:31:56
FRA 2:32:33
CAN 2:33:28
ITA 2:33:38
PER 2:34:00
SWE 2:36:29
KOR 2:37:22
NED 2:37:54