When we think about productivity in an economy, we are normally referring to the output of human workers. But some segments of the economy also feature a nonhuman labor force.
Dairy cows, for example, are a key part of the milk industry. And according to this striking chart from the US Department of Agriculture, their productivity has surged over the past generation:
:format(webp):no_upscale()/cdn.vox-cdn.com/uploads/chorus_asset/file/6341881/ImageGen.png)
Cow wages, presumably, have not increased commensurately during this period.
