Canadian Triple Crown of Thoroughbred Racing was created in 1959.
Silver Charm won the first two triple crown races (the Derby and the Preakness). Touch Gold won the Belmont...so no triple crown winner in 1997.
There were no Thoroughbred Triple Crown winners in 2012.
The "Triple Crown" is usually referring to the "Triple Crown of Thoroughbred Racing". There are three races: The Kentucky Derby, the Preakness Stakes and the Belmont Stakes.
Thoroughbred Triple Crown winner, Secretariat.
Affirmed in 1978.