kd2008,
It can't be 1.5 times! Just look at PERM & 485data for I&C for CY 2006
I&C 2006 PD Certified in FY2006 = 18,011
I&C 2006 PD Certified FY2007-11 =14,746
I&C 2006 PD Total = 32,757
EB2I&C 2006 PD 485 known demand =27,159+porting based on Dec 2009 inventory update.
Ratio ~= 0.83
Note:This is only for discussion purposes for people like to get EB2IC ballpark estimate based on PERM approvals.