The ExpiryYear of the frame.
A 4-digit integer that represents the year the card expires.
Obtaining good results for the ExpiryMonth and ExpiryYear sometimes requires many frames. Scanning can continue (even after the ScanFrameStatus is NumbersFound), as long as ExpiryMonth and ExpiryYear are equal to 0. The input may be the last two digits of the year. The output is a four-digit year number.