Hemoptysis is seen in what propoion of the post primary(adult type) tuberculosis?

Hemoptysis develops in 20-30% of cases, and massive hemoptysis due to erosion of a blood vessel in the wall of a cavity. May also result from rupture of a dilated vessel in a cavity (Rasmussen's aneurysm) or from aspergilloma formation in an old cavity. Reference: Harrisons Principles of Internal Medicine, 18th Edition, Page 1345