CREATE TABLE table_256286_45 (type VARCHAR, yes_votes VARCHAR)
SELECT COUNT(type) FROM table_256286_45 WHERE yes_votes = 312680
มีกี่ประเภทสำหรับการวัดที่มีคะแนนโหวตใช่ 312680?
How many types are there for the measure where there were 312680 yes votes?