Number Sequence in ax 2012

Hi all,

I have a requirment that i need to Generate a number Sequence based on FISCAL calender's.

like if Fiscal calender is on 2012 then My number seq should generate 0001_2012,0002_2012

Fiscal calender is on 2013 then My number seq should generate 0001_2013,0002_2013.

Can any one help me out how to achieve this.

Thanks in Advance ....