Nuclear Proliferation: Countries with Nuclear Weapons and When they were Aquired

United States-16 July 1945

United Kingdom-3 October 1952
U.S.S.R/Russian Federation-August 12, 1953
France-February 13, 1960
China-October 16, 1964
Israel-September 22, 1979
India-18 May 1974
Pakistan-May 28, 1998
North Korea-October 9, 2006
click image for more on this subject

and
South Africa-22 September 1979
South Africa is the only country to give up all their
Nuclear Weapons.
South Africa stood down its nuclear weapons programme in 1989.