The correct answer is 1920s.
During the 1920s, particularly after World War I, Germany experienced extreme hyperinflation, especially in 1923. This economic crisis was a result of the reparations imposed by the Treaty of Versailles, economic mismanagement, and the political instability of the Weimar Republic. While unemployment and poverty also affected the 1930s, notably during the Great Depression, the hyperinflation as a phenomenon is most closely associated with the 1920s.