40 Capital Cities Closest to country's Geographical Center

Can you find the 40 Capital Cities that are closest to their country's Geographical Center? The colour is a hint on the size of the country
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)
Colour clues: red if country's area is less than 100 km2, blue if area is larger than 100,000 km2; shades of purple in between
Quiz by scambigol
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Last updated: September 25, 2015
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First submittedSeptember 25, 2015
Times taken193
Average score32.5%
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D (km)
ANSWER
0.3
Vatican City
1.3
Monaco
1.7
San Marino
1.9
Andorra La Vella
2.1
Yaren
4.9
Basseterre
8.8
Saint John's
9.6
Valletta
9.8
Palikir
10.1
Tarawa
10.1
Singapore
10.4
Kingstown
10.8
Doha
11
Ouagadougou
11.1
Saint George's
11.5
Dhaka
11.6
Bridgetown
13.1
Castries
13.6
Melekeok
13.9
Vaduz
13.9
Kigali
14
Roseau
14.4
Port Louis
16.5
Nicosia
16.7
San Jose
16.9
Pristina
22.2
Luxembourg
24
Manama
24.3
Victoria
25.9
Belmopan
26.5
Madrid
26.6
Chisinau
27.3
Asmara
31.1
Kuwait City
37.3
Port-of-Spain
39.2
Jerusalem
39.6
Brussels
40
Ljubljana
41.6
Podgorica
41.8
Djibouti
+1
Level 76
Sep 25, 2015
Andorra la Vella? From the country's centre it's only 15 km in any direction to the border, so the distance from the centre to the capital would have to be less than that.
+1
Level 76
Sep 25, 2015
Well spotted, thanks! I must have made a mistake when sorting the data etc. Fixed now
+1
Level 71
Apr 15, 2018
How can't Singapore be 0. I mean the Capital of Singapore is Singapore..