(the degree of) self-sufficiency (e.g. in oil)
日本の食料自給率が低い。
Japan's food self-sufficiency rate is low.
彼は食料自給率を上げると訴えた。
He campaigned on raising the food self-sufficiency rate.
エネルギー自給率の改善を研究者が提案した。
A researcher proposed improving the energy self-sufficiency rate.