Final answer:
Union membership rates, birth rates, and inflation rates increased significantly after World War II.
Explanation:
Union membership rates increased significantly during the two decades following the end of World War II. This period marked the rise of labor unions and the expansion of workers' rights, leading to a surge in union membership across various industries.
Birth rates also increased notably after World War II, creating the baby boom generation. The post-war economic prosperity and social changes contributed to a significant rise in the number of births during this period.
Meanwhile, inflation rates were another notable factor that increased during the post-World War II era. The end of price controls and other economic shifts led to a notable uptick in inflation rates, impacting the overall economic landscape.
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