Story highlights Marco Rubio released 22 months of Florida GOP credit card statements

Those months show eight personal charges, which Rubio said he paid himself

Washington (CNN) Marco Rubio's presidential campaign released 22 months of charge card statements on Saturday that show the candidate made $7,243.74 in personal purchases in 2005 and 2006 on a Florida Republican Party charge card.

The announcement comes as Rubio is under greater scrutiny for his personal use of the American Express charge card, which he said was secured under his personal credit in conjunction with the state's Republican Party. Some of Rubio's previous charge card statements have emerged, but the release on Saturday provides the first look at his purchases for the period from January 2005 through October 2006 when he led the campaign operation for Florida House Republicans.

Rubio has said he mixed personal and business expenses on the card -- but paid for the personal charges himself, while the Florida Republican Party covered business-related political costs.

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