Perhaps you should try some spelling variations:
"improving global performance series." » "improving global performance studies.", "improving global performance size.", "improving total performance series.", "improving regional performance series.", "improving general performance series.", "improving fiscal performance series.", "improving growth performance series.", "providing global performance series."
"improving local performance series." » "improving local performance studies.", "improving local performance size.", "improving social performance series.", "improving total performance series.", "improving fiscal performance series."

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