2022 through the u.s . attorney 2019s office for the district of maryland , the office of the inspector general ( 201coig 201d ) for the small business administration ( 201csba 201d ) has served a subpoena on pnc requesting documents concerning pnc 2019s relationship with , including sba-guaranteed loans made through , a broker named jade capital investments , llc ( 201cjade 201d ) , as well as information regarding other pnc-originated sba guaranteed loans made to businesses located in the state of maryland , the commonwealth of virginia , and washington , dc . certain of the jade loans have been identified in an indictment and subsequent superseding indictment charging persons associated with jade with conspiracy to commit bank fraud , substantive violations of the federal bank fraud statute , and money laundering . pnc is cooperating with the u.s . attorney 2019s office for the district of maryland . our practice is to cooperate fully with regulatory and governmental investigations , audits and other inquiries , including those described in this note 23 . in addition to the proceedings or other matters described above , pnc and persons to whom we may have indemnification obligations , in the normal course of business , are subject to various other pending and threatened legal proceedings in which claims for monetary damages and other relief are asserted . we do not anticipate , at the present time , that the ultimate aggregate liability , if any , arising out of such other legal proceedings will have a material adverse effect on our financial position . however , we cannot now determine whether or not any claims asserted against us or others to whom we may have indemnification obligations , whether in the proceedings or other matters described above or otherwise , will have a material adverse effect on our results of operations in any future reporting period , which will depend on , among other things , the amount of the loss resulting from the claim and the amount of income otherwise reported for the reporting period . see note 24 commitments and guarantees for additional information regarding the visa indemnification and our other obligations to provide indemnification , including to current and former officers , directors , employees and agents of pnc and companies we have acquired . note 24 commitments and guarantees equity funding and other commitments our unfunded commitments at december 31 , 2013 included private equity investments of $ 164 million . standby letters of credit we issue standby letters of credit and have risk participations in standby letters of credit issued by other financial institutions , in each case to support obligations of our customers to third parties , such as insurance requirements and the facilitation of transactions involving capital markets product execution . net outstanding standby letters of credit and internal credit ratings were as follows : table 151 : net outstanding standby letters of credit dollars in billions december 31 december 31 net outstanding standby letters of credit ( a ) $ 10.5 $ 11.5 internal credit ratings ( as a percentage of portfolio ) : .

december 31 2013: net outstanding standby letters of credit ( a ): 10.5
pass ( b ): -96
below pass ( c ): -4
december 312012: net outstanding standby letters of credit ( a ): 11.5
pass ( b ): -95
below pass ( c ): -5

( a ) the amounts above exclude participations in standby letters of credit of $ 3.3 billion and $ 3.2 billion to other financial institutions as of december 31 , 2013 and december 31 , 2012 , respectively . the amounts above include $ 6.6 billion and $ 7.5 billion which support remarketing programs at december 31 , 2013 and december 31 , 2012 , respectively . ( b ) indicates that expected risk of loss is currently low . ( c ) indicates a higher degree of risk of default . if the customer fails to meet its financial or performance obligation to the third party under the terms of the contract or there is a need to support a remarketing program , then upon a draw by a beneficiary , subject to the terms of the letter of credit , we would be obligated to make payment to them . the standby letters of credit outstanding on december 31 , 2013 had terms ranging from less than 1 year to 6 years . as of december 31 , 2013 , assets of $ 2.0 billion secured certain specifically identified standby letters of credit . in addition , a portion of the remaining standby letters of credit issued on behalf of specific customers is also secured by collateral or guarantees that secure the customers 2019 other obligations to us . the carrying amount of the liability for our obligations related to standby letters of credit and participations in standby letters of credit was $ 218 million at december 31 , 2013 . standby bond purchase agreements and other liquidity facilities we enter into standby bond purchase agreements to support municipal bond obligations . at december 31 , 2013 , the aggregate of our commitments under these facilities was $ 1.3 billion . we also enter into certain other liquidity facilities to support individual pools of receivables acquired by commercial paper conduits . there were no commitments under these facilities at december 31 , 2013 . 212 the pnc financial services group , inc . 2013 form 10-k .

Questions:
as of december 31, 2013, what would be, in billions, the total balance of net outstanding standby letters of credit including the letters of credit for other financial institutions?
as of that same date, what was the total of the remarketing programs, in billions?
and what was it in one year before, in december 31 of 2012?
by how much, then, in billions, did it change over the period?

Answers:
13.8
7.5
6.6
0.9