WASHINGTON — The annual number of continuing disclosure documents muni bond issuers filed with the Municipal Securities Rulemaking Board continues to increase, with issuers submitting 139,043 documents in the 12 months ending in June 2012, according to an MSRB report released Wednesday.

That's a 5% jump from the previous 12-month period, when issuers submitted 132,842 disclosures, and a 12% increase from the 12 months before that, when issuers filed 124,206 documents.

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