Thanks Eli for the quick answer. I dreaded that answer 
Just for clarification, can you please tell me if I need to put periods 13 to 16 in my selection?
In other words,
I start my selection with period 7 to 12/16 for July to December 2014 (FY 2014)
I then run again the report with period 1 to 6 for periods January to June 2015 (FY 2015)
I finally sum the first report with the second to complete the full scope.
Thanks again
Sylvain