1. Ken - 66 (incl Ozbilan now repr Turkey)
2. Eth - 26
3. Japan - 4 (led by Yuki Kawauchi 2:09:01)
4 Eritrea - 2 (incl T. Abraham now rep Swiss)
5 Uganda - 1
6. Tanzania - 1
Trivia:
- 100th place is 2:09:37, 2015 100th place was 2:08:53
- Eth/Kenya both have 5 of top 10, Kenny B in first with 2:03:03.
- Rupp is top American in 112 from Rio's 2:10:05.
- Japan also has position 101, but that will change after Fukuoka.
- Ethiopia pop is 94 mil, Kenya 44 mil, Eritrea 6 mil, Japan 127 mil,
USA 320 mil
Here's the source which i may have miscounted. Note the same person can be counted twice e.g. Kenny B is #1 and #22.
https://www.iaaf.org/records/toplists/road-running/marathon/outdoor/men/senior/2016
There's also this for 2015:
http://www.aims-worldrunning.org/statistics/2015Statistics.htm#FullMen