What was the highest value of the US dollar?

Could you please elaborate on what you mean by "the highest value of the US dollar"? Are you referring to the highest exchange rate the US dollar has had against another currency? Or perhaps the highest purchasing power parity adjusted value of the dollar over time? The answer would depend significantly on the context and the specific currency or measure you are comparing the US dollar against. For example, the highest value of the US dollar against the Japanese yen was quite different from its highest value against the euro. Could you provide more information to clarify your question?