There is a trend in South Korea towards delaying marriage, contributing to a declining birthrate. However, immigration has been offsetting the effects of a declining birthrate. With a declining birthrate and population, labor was the key factor of production. There is continuing debate about the role women's education plays in Japan's declining birthrate. Such conditions contribute heavily to Russia's declining birthrate and the general deterioration of the family. Stagnation worsened as the birthrate declined far below replacement level. Mainline denomination members have the lowest birthrate among American Christian groups. It declined due to a low birthrate in the following years. France needed workforce to compensate for the war losses and its very low birthrate. In 2006 it had the second lowest birthrate in the nation, 42/1000 women. The Afrikaners tend to have a higher birthrate than that of other white people. The falling birthrate appeared to be a grave problem to Vichy. One major long-term concern for the Japanese labor force is its low birthrate. This results in an average birthrate of 2&colon;1, hairless &colon; coated. The U.S. birthrate exploded after World War II.