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1. United Kingdom
> Joined: Nov. 19, 1926
> Population: 67,326,570
> System of government: Unitary Commonwealth realm
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2. Australia
> Joined: Nov. 19, 1926
> Population: 25,739,260
> System of government: Federal Commonwealth realm
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3. Canada
> Joined: Nov. 19, 1926
> Population: 38,246,110
> System of government: Federal Commonwealth realm
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4. New Zealand
> Joined: Nov. 19, 1926
> Population: 512,260
> System of government: Unitary Commonwealth realm
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5. South Africa
> Joined: Nov. 19, 1926
> Population: 600,420
> System of government: Unitary parliamentary republic with an executive presidency
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