CREATE TABLE table_6460 ("District" TEXT, "2010 Population  ( 000 ) " FLOAT, "2008 GDP  ( USD bn )  a" FLOAT, "2008 GDP per capita  ( USD )  a" FLOAT, "Agri culture b" FLOAT, "Mining b" FLOAT, "Manufac turing b" FLOAT, "Services & cons truction b" FLOAT, "Exports  ( USD mn )  2011" TEXT, "Median mo. salary  ( USD )  a e" FLOAT, "Vehicles  ( per 1000 )  d" FLOAT, "Income poverty f" FLOAT, "Structural poverty g" FLOAT)

Agri culture b larger than 12.6, what is the lowest vehicles per 1000?
SELECT MIN("Vehicles (per 1000) d") FROM table_6460 WHERE "Agri culture b" > '12.6'
SELECT MIN("Vehicles (per 1000) d") FROM "table_6460" WHERE "Agri culture b" > '12.6'