<Li> Switzerland: 1991 (from 20; referendum held on 3 March) </Li> <Li> Austria: 1992 (from 19; previous reductions were 21 to 20 in 1949 and 20 to 19 in 1970) </Li> <Li> Estonia: 29 July 1992 (from 22, according to the 1938 Constitution; was 18 during the Soviet Occupation since 1940 and 16 for the Congress of Estonia in 1990) </Li> <Li> Hong Kong: 1995 (from 21) </Li>

When did the legal voting age become 18