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Countries bordering a Country precisely East of it

Can you find the 20 pairs of bordering countries such that when flying between their geographical centers you need to follow a bearing close to 90°?
Data from Portland State University (https://www.pdx.edu/econ/country-geography-data), for missing countries from CIA (https://www.cia.gov/library/publications/the-world-factbook/fields/2011.html)
The bearing shown is the 'rhombus' bearing you need to follow to fly from the 'West' country to the 'East' country
Quiz by scambigol
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Last updated: December 13, 2015
First submittedDecember 13, 2015
Times taken30
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Bearing
West Country
East Country
90.3°
Zambia
Malawi
90.3°
Benin
Nigeria
89.5°
Mali
Niger
90.6°
Haiti
Dominican Republic
90.8°
Greece
Turkey
91.1°
Armenia
Azerbaijan
91.4°
Namibia
Botswana
91.8°
Uzbekistan
Kyrgyzstan
87.9°
Slovakia
Ukraine
92.5°
Saudi Arabia
United Arab Emirates
92.7°
Iraq
Iran
93.1°
Libya
Egypt
86.6°
South Sudan
Ethiopia
93.4°
Bosnia and Herzegovina
Serbia
93.8°
Gabon
Republic of the Congo
94.2°
Tajikistan
China
85.5°
Cote d'Ivoire
Ghana
94.5°
Peru
Brazil
85.4°
France
Switzerland
94.8°
Algeria
Libya
+1
level 72
Dec 13, 2015
Guyana-Suriname?
+1
level 71
Dec 13, 2015
101º according to my data - The Southern border is 'straight' but the coastline does 'go down' from Guyana to Suriname