Read the following texts and table with financial data from an S&P 500 earnings report carefully.Based on the question-answer history (if provided), answer the last question. The answer may require mathematical calculation based on the data provided.


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 ) : . <table class='wikitable'><tr><td>1</td><td>dollars in billions</td><td>december 31 2013</td><td>december 312012</td></tr><tr><td>2</td><td>net outstanding standby letters of credit ( a )</td><td>$ 10.5</td><td>$ 11.5</td></tr><tr><td>3</td><td>internal credit ratings ( as a percentage of portfolio ) :</td><td>-</td><td>-</td></tr><tr><td>4</td><td>pass ( b )</td><td>96% ( 96 % )</td><td>95% ( 95 % )</td></tr><tr><td>5</td><td>below pass ( c )</td><td>4% ( 4 % )</td><td>5% ( 5 % )</td></tr></table> ( 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 .
Question: 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?
Answer: 13.8
Question: as of that same date, what was the total of the remarketing programs, in billions?
Answer: 7.5
Question: and what was it in one year before, in december 31 of 2012?
Answer: 6.6
Question: by how much, then, in billions, did it change over the period?

0.9