KEY: Ratification on June 10, 1919 (yellow); ratification from June 16, 1919 to July 28, 1919 (chartreuse); ratification from August 2, 1919 to December 15, 1919 (aqua); ratification from January 6, 1920 to March 22, 1920 (gray-green); ratification on August 18, 1920 (gray).
