The natural growth rate = Brith rate − Death rate Period 1911−1921=48.1−35.5=12.6 1921−1931=46.4−36.3=10.1 1931−1941=45.2−31.2=14.0 1941−1951=39.9−27.4=12.5 1951−1961=41.7−22.8=18.9 1961−1971=41.1−18.9=22.2 1971−1981=37.1−14.8=22.3 Here, Maximum growth rate in (1971−1981) period.