No town, school district, or village district shall raise and appropriate in any one year for such reserve an amount in excess of 1/2 of one percent of the last base valuation for debt limit computed pursuant to RSA 33:4-b of said town or district; no county shall raise and appropriate for such reserve an amount in excess of 1/50 of one percent of the last base valuation for debt limit computed pursuant to RSA 33:4.