It sounds like these dairy subsidies fluctuate greatly.

In 2016, the dairy industry asked the U.S. Department of Agriculture (USDA) for a staggering $150 million to buy their excess cheese. A spokesperson for the National Farmers Union said they were disappointed to receive “only” $20 million. [0]

And according to this 600 page Canadian report, indirect subsidies are also a huge factor and contribute to 73 percent of producer returns coming from subsidies. [1]

The American government contributed around $22.2 billion in direct and indirect subsidies to the dairy sector in 2015.

[0] https://thehill.com/opinion/energy-environment/377406-dairy-...

[1] https://www.realagriculture.com/2018/02/u-s-dairy-subsidies-...