How longer the corn prices to decrease

Corn prices are in strong minus. If we consider the long term price trends, prices are falling further everywhere.

Economically it is understandable: the global yield of the past two years was the third highest yield ever and as the demand has not kept pace, inventories are at record levels. So it is clear what is happening and why, but the producers will not be happier. We cannot see any trend in the foreseeble future that would reverse this trend.