From: An empirical analysis of African trade blocs effects on the global economy: new evidence from the gravity model
REC
GDP
Number of member states
Exports
Imports
Trade
SADC
694.2
16
113.8
126
239.8
COMESA
666.9
19
105.3
174.4
279.7
EAC
226.8
6
15.3
37.1
52.4
SACU
408.9
5
111.6
117.7
229.3
ECOWAS
609.6
15
112.3
286.7
ECCAS
223.7
11
85.5
47.6
133.1