How can I make this formula respond ONLY to two-digit values in a range? (Array Entered)

=IF(MAX(COUNTIF(Data1,Data1))1,"Y","N")

Where the values may also be values-stored-as-text.

This returns "Y" because of the two 15's

1589 15 1789
189 4 189
2 15 6

This returns "N" ignoring the two 189's

1589 16 1789
189 4 189
2 15 6


Thanks,
Howard