Bouvet Island of establishing a manned meteorological radio station, but a suitable location could not be found. By then both the flagpole and hut from the previous year had been washed away. The Third "Norvegia" Expedition, led by Hjalmar Riiser-Larsen, arrived the following year and built a new hut at Kapp Circoncision and on Larsøya. The expedition carried out aerial photography of the island and was the first Antarctic expedition to use aircraft. The "Dependency Act", passed by the Parliament of Norway on 27 February 1930, established Bouvet Island as a dependency, along with Peter I Island and Queen Maud Land. The
Dependency ratio young adults migrate into their country. This method has shown great results in Asia's economic growth. The increase in the involvement of women in the work force has contributed to the working-age population which compliments the dependency ratio for a country. Encouraging women to work will help decrease the dependency ratio. Because more women are getting a higher education, it is less likely for them to have children causing the fertility rates to decrease as well. The age-dependency ratio can determine which stage in the Demographic Transition Model a certain country is in. The dependency ratio acts like a rollercoaster