20 Countries with Geographical Center closest to Prime Meridian

Can you find the 20 countries whose Geographical Center is closest to the Prime Meridian?
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)
You are shown the distance you have to travel east (or west) to reach the Prime Meridian
Quiz by scambigol
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Last updated: September 12, 2015
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First submittedSeptember 12, 2015
Times taken101
Average score85.0%
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D (km)
COUNTRY
111
Ghana
123
Andorra
127
Togo
167
Burkina Faso
170
United Kingdom
208
France
277
Algeria
280
Benin
287
Spain
341
Belgium
351
Mali
397
Netherlands
453
Luxembourg
532
Ireland
577
Morocco
587
Cote d'Ivoire
595
Monaco
619
Denmark
637
Switzerland
665
Portugal
+1
Level 76
Sep 15, 2015
Nice! How about an A-Z version of this one?
+1
Level 76
Sep 16, 2015
I have a few A-Z ready to be submitted! Actually I think I have prepared Tropics and Equator but not prime Meridian