Section 11. He shall annually as soon after the prorogation of the general court as is practicable, publish a statement showing the assessments for interest, principal, and maintenance requirements due from towns in the metropolitan parks districts; a statement showing the several classes of debts incurred for metropolitan district purposes, and the share of the towns in the district as measured by the basis used in computing the assessments mentioned in the first statement; and such other statements, if any, as he may deem advisable. The expense of printing shall be apportioned and paid from the maintenance fund of the parks districts.