Version 5 (fixed roadconstruction_emp, added roadconstruction_wage)
Dec2013 version reflects some changes in CIT rates based on Nate Seegert's data
July 2013 Version (Fixed roadconstruction_emp, added roadconstruction_wage)
080714 version reflects updated ITC data thru 2013.
Dec2013 version reflects some changes in CIT rates based on Nate Seegert's data.