Sure, no problem. Just create a subaward under DXCC. (Tools/setup/log fields. Navigate to the DXCC record).
You could also automate the 2015 part of the expression with
YEAR(QSO_DATE)=YEAR(DATE())
This way it will automatically start doing 2016 for you upon the new year.
Let me know if any questions.
Tnx & 73,
Dennis WN4AZY