period --now=2010/11/01 12/01
<<<
>>>1
global details => 

   start: 09-Dec-01
     end: 09-Dec-02
  factor: 1
>>>2
=== 0
period --now=2010/11/01 10/01
<<<
>>>1
global details => 

   start: 10-Oct-01
     end: 10-Oct-02
  factor: 1
>>>2
=== 0
period --now=2010/11/01 2009/10
<<<
>>>1
global details => 

   start: 09-Oct-01
     end: 09-Nov-01
  factor: 1
>>>2
=== 0
period --now=2010/11/01 2009/10/01
<<<
>>>1
global details => 

   start: 09-Oct-01
     end: 09-Oct-02
  factor: 1
>>>2
=== 0
period --now=2010/11/01 2009
<<<
>>>1
global details => 

   start: 09-Jan-01
     end: 10-Jan-01
  factor: 1
>>>2
=== 0