This BBC article reveals how meat consumption increases with increased GDP however don’t be fooled into thinking that increased meat consumption is the cause of modern diseases as many would have you believe.
When examining population data (which is not always the most reliable anyway!) there is more association between diets rich in refined carbs and increased disease outcomes than there is with meat. Animal-sourced proteins (eggs, fish, dairy, meat, etc) are by far the richest source of nutrient-dense foods on the planet, that’s why we evolved to eat them!
Final food for thought. Why spend hours foraging/grazing on plant foods when you can get all the energy and nutrients you need from animals for a much lower investment in both time & energy?