I'm sorry Raiko I am a little confused. In the data you provide column 3 contains values of 1 and 12, which coincide with the months of Jan and Dec, correct?
Raiko's Excel files consists of two sheets. You are referring to the first one "Sheet1" but Raiko is accessing the second one "FVW" which consists of two columns only.
@Raiko: Are you looking for something like this:
