Go here to view a slide show on the evolution of Paricutin prepared by Scott Rowland. Sources of Information: Foshag, W.F., and Gonzalez-Reyna, J., 1956, Birth and development of Paricutin volcano: U.S. Geological Survey Bulletin 965-D, p. 355-489.
In 1971, the Twenty-sixth Amendment set the legal voting age at 18 for both US federal and state elections.
The voting age had been reduced in Austria from 19 to 18 at all levels in 1992. At that time a voting age of 16 was proposed by the Green Party, but was not adopted. The voting age for municipal elections in some states was lowered to 16 in the early years of the 2000s.