How many grades can Heilongjiang rural insurance receive?

* * * It has the grade of 12, with the lowest monthly subsidy in 40 yuan and the highest subsidy of 140 yuan. According to the information released by Social Security Help Network, there are 12 grades of agricultural insurance in Heilongjiang Province, which are 200 yuan, 300 yuan, 400 yuan, 500 yuan, 600 yuan, 700 yuan, 800 yuan, 900 yuan, 1000 yuan, 1500 yuan, 2,000 yuan and 3,000 yuan each year, and corresponding grades can be obtained. The calculation formula is endowment insurance personal account balance ÷ 139. For example, if the payment is made according to the standard of 200 yuan, plus the subsidy from 40 yuan, it is 15,240×15 = 3600, and the personal account balance of endowment insurance is the least.