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BRASILIA, April 14 (Reuters) - Brazil's Embraer SA delivered 21 commercial jets and 23 executive aircraft in the first quarter, 37.5 percent more than in the same period of last year, the company said in a statement on Thursday.
Embraer's backlog of firm orders, a measure of expected revenue, totaled $21.9 billion as of March 31, down from $22.5 billion at the end of 2015. (Reporting by Silvio Cascione. Editing by Jane Merriman)