The long-term energy transition in Europe, Italy, 1900 to 1950

Share of energy production by traditional energy carrier, measured as the percentage of total energy production, from 1850-2000. "Muscle energy corresponds to the
input of food by men and working animals; firewood to the actual consumption; wind and water have been estimated from the power of water and wind engines –
sailing ships included – and the time, per year, these engines were in use.”