Bisa ga wannan kididdiga, shekaru daga 2040 zuwa 2050 ya kamata ya sami raguwa na yawan canji na shekara-shekara. Yawan jama'ar Koriya ta Kudu ya nuna ci gaba mai ƙarfi tun lokacin da aka kafa jamhuriyar a 1948, sannan kuma ya ragu sosai tare da tasirin haɓakar tattalin arzikinta. A cikin ƙididdigar hukuma ta farko, da aka ɗauka a 1949, an ƙididdige yawan jama'ar Koriya ta Kudu a 20,188,641 mutane. A ƙididdigar ƙididdigar 1980 ya kasance 40,467.57 yawan jama'ar Koriya ta Kudu ya kamata ya karu da kimanin 1.1% a kowace shekara daga 1949 zuwa 1955, 0.28% a kowace shekara ya karu da 2025, 0.18% a kowace shekara ya karu da 52,701,817, da kuma 0.04% a kowace shekara ya karu da 2035. Bisa ga waɗannan ƙididdigar, shekarun daga 2040 zuwa 2050 ya kamata ya sami raguwa a cikin yawan canji na shekara-shekara. Yawan jama'ar Koriya ta Kudu ya karu da sauri a tsakanin shekara ta 1955 zuwa shekara ta 1955, da kuma a cikin shekaru goma sha biyar da suka gabata, yawan jama'ar Koriya ta
40,466,577 (shekara ɗaya da rabi)