What world currencies have 4 letters in name?

There are four world currencies that have 4 letters in their name:

- Euro (EUR)

- Peso (ARS, CHI, COP, CUP, DOP, MXN, PHP, UYU)

- Rial (IRR, OMR, QAR, YER)

- Yuan (CNY)

What does post 1994 mean?

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