How long has the TV game show "Wheel of Fortune" been on the air?

The syndicated TV program “Wheel of Fortune” with Pat Sajak and Vanna White has been on the air since September, 1983.

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How long has the FBI been in operation? An agency called the Bureau of Investigation was instituted in…
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How long has the Heisman Trophy been awarded? The Heisman Trophy has been awarded since 1935 by the…

How long has the TV game show “Wheel of Fortune” been on the air?