.

contractual obligations
2015
2016
2017
2018
2019
thereafter
total
long-term obligations excluding capital leases
888810
753045
700608
1787451
3159286
7188751
14477951
cash interest expense
550000
517000
485000
399000
315000
654000
2920000
capital lease payments ( including interest )
15589
14049
12905
12456
10760
173313
239072
total debt service obligations
1454399
1284094
1198513
2198907
3485046
8016064
17637023
operating lease payments ( 11 )
574438
553864
538405
519034
502847
4214600
6903188
other non-current liabilities ( 12 ) ( 13 )
11082
20480
5705
13911
4186
1860071
1915435
total
$ 2039919
$ 1858438
$ 1742623
$ 2731852
$ 3992079
$ 14090735
$ 26455646

( 1 ) represents anticipated repayment date ; final legal maturity date is march 15 , 2043 .
( 2 ) represents anticipated repayment date ; final legal maturity date is march 15 , 2048 .
( 3 ) in connection with our acquisition of mipt on october 1 , 2013 , we assumed approximately $ 1.49 billion aggregate principal amount of secured notes , $ 250.0 million of which we repaid in august 2014 .
the gtp notes have anticipated repayment dates beginning june 15 , 2016 .
( 4 ) assumed in connection with our acquisition of br towers and denominated in brl .
the br towers debenture amortizes through october 2023 .
the br towers credit facility amortizes through january 15 , ( 5 ) assumed by us in connection with the unison acquisition , and have anticipated repayment dates of april 15 , 2017 , april 15 , 2020 and april 15 , 2020 , respectively , and a final maturity date of april 15 , 2040 .
( 6 ) denominated in mxn .
( 7 ) denominated in zar and amortizes through march 31 , 2020 .
( 8 ) denominated in cop and amortizes through april 24 , 2021 .
( 9 ) reflects balances owed to our joint venture partners in ghana and uganda .
the ghana loan is denominated in ghs and the uganda loan is denominated in usd .
( 10 ) on february 11 , 2015 , we redeemed all of the outstanding 4.625% ( 4.625 % ) notes in accordance with the terms thereof .
( 11 ) includes payments under non-cancellable initial terms , as well as payments for certain renewal periods at our option , which we expect to renew because failure to renew could result in a loss of the applicable communications sites and related revenues from tenant leases .
( 12 ) primarily represents our asset retirement obligations and excludes certain other non-current liabilities included in our consolidated balance sheet , primarily our straight-line rent liability for which cash payments are included in operating lease payments and unearned revenue that is not payable in cash .
( 13 ) excludes $ 26.6 million of liabilities for unrecognized tax positions and $ 24.9 million of accrued income tax related interest and penalties included in our consolidated balance sheet as we are uncertain as to when and if the amounts may be settled .
settlement of such amounts could require the use of cash flows generated from operations .
we expect the unrecognized tax benefits to change over the next 12 months if certain tax matters ultimately settle with the applicable taxing jurisdiction during this timeframe .
however , based on the status of these items and the amount of uncertainty associated with the outcome and timing of audit settlements , we are currently unable to estimate the impact of the amount of such changes , if any , to previously recorded uncertain tax positions .
off-balance sheet arrangements .
we have no material off-balance sheet arrangements as defined in item 303 ( a ) ( 4 ) ( ii ) of sec regulation s-k .
interest rate swap agreements .
we have entered into interest rate swap agreements to manage our exposure to variability in interest rates on debt in colombia and south africa .
all of our interest rate swap agreements have been designated as cash flow hedges and have an aggregate notional amount of $ 79.9 million , interest rates ranging from 5.74% ( 5.74 % ) to 7.83% ( 7.83 % ) and expiration dates through april 2021 .
in february 2014 , we repaid the costa rica loan and subsequently terminated the associated interest rate swap agreements .
additionally , in connection with entering into the colombian credit facility in october 2014 , we terminated our pre-existing interest rate .

Question: assuming a midpoint interest rate in the range , what would be the annual interest expense on interest rate swap agreements based on the notional amounts , in millions?
Answer: 5.4