on several occasions, stipulated that an amendment must be ratified by the required number of states within seven years from the date of its submission to the states in order to become part of the Constitution. Congress's authority to set a ratification deadline was affirmed in 1939 by the United States Supreme Court in Coleman v. Miller (). Approximately 11,770 proposals to amend the Constitution have been introduced in Congress since 1789 (as of January 3, 2019). Collectively, members of the House and Senate typically propose around 200 amendments during each two-year term of Congress. Proposals have covered numerous topics, but none made in recent decades have become part of the Constitution. Historically, most died in the congressional committees to which they were assigned. Since 1999, only about 20 proposed amendments have received a vote by either the full House or Senate. The last time a proposal gained the necessary two-thirds support in both the House and the Senate for submission to the states was the District of Columbia Voting Rights Amendment in 1978. Only 16 states had ratified it when the seven-year time limit expired. Ratified amendments Synopsis of each ratified amendment For the full text of amendments to the United States Constitution, see Additional amendments to the United States Constitution on Wikisource Summary of ratification data for each ratified amendment Unratified amendments Synopsis of each unratified amendment Summation of ratification data for each unratified amendment See also History of the United States Constitution Convention to propose amendments to the United States Constitution References External links U.S. Constitution, FindLaw.com The United States Constitution, USConstitution.net Amendments to the Constitution