Now added, they show academies permanently excluded 5.5 pupils in every thousand, compared with a rate of 2.4 in other secondaries in England.
The government says this is because academies have "challenging intakes".
The figures published by the Department for Children, Schools and Families are those given by academies and city technology colleges themselves and are unconfirmed, it says.
The totals involved are small, as only relatively few academies are open: there were 140 permanent exclusions in total.
In 2002-03 there were 30, but this was almost 10 per thousand pupils, and the rate has been dropping dramatically since.
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