Financial report context:
contractual commitments we have contractual obligations and commitments in the form of capital leases , operating leases , debt obligations , purchase commitments , and certain other liabilities . we intend to satisfy these obligations through the use of cash flow from operations . the following table summarizes the expected cash outflow to satisfy our contractual obligations and commitments as of december 31 , 2010 ( in millions ) : .

Financial table:
commitment type: capital leases; 2011: $ 18; 2012: $ 19; 2013: $ 19; 2014: $ 20; 2015: $ 21; after 2016: $ 112; total: $ 209
commitment type: operating leases; 2011: 348; 2012: 268; 2013: 205; 2014: 150; 2015: 113; after 2016: 431; total: 1515
commitment type: debt principal; 2011: 345; 2012: 2014; 2013: 1750; 2014: 1000; 2015: 100; after 2016: 7363; total: 10558
commitment type: debt interest; 2011: 322; 2012: 321; 2013: 300; 2014: 274; 2015: 269; after 2016: 4940; total: 6426
commitment type: purchase commitments; 2011: 642; 2012: 463; 2013: 425; 2014: 16; 2015: 2014; after 2016: 2014; total: 1546
commitment type: pension fundings; 2011: 1200; 2012: 196; 2013: 752; 2014: 541; 2015: 274; after 2016: 2014; total: 2963
commitment type: other liabilities; 2011: 69; 2012: 67; 2013: 64; 2014: 58; 2015: 43; after 2016: 38; total: 339
commitment type: total; 2011: $ 2944; 2012: $ 1334; 2013: $ 3515; 2014: $ 2059; 2015: $ 820; after 2016: $ 12884; total: $ 23556

Additional report context:
our capital lease obligations relate primarily to leases on aircraft . capital leases , operating leases , and purchase commitments , as well as our debt principal obligations , are discussed further in note 7 to our consolidated financial statements . the amount of interest on our debt was calculated as the contractual interest payments due on our fixed-rate debt , in addition to interest on variable rate debt that was calculated based on interest rates as of december 31 , 2010 . the calculations of debt interest take into account the effect of interest rate swap agreements . for debt denominated in a foreign currency , the u.s . dollar equivalent principal amount of the debt at the end of the year was used as the basis to calculate future interest payments . purchase commitments represent contractual agreements to purchase goods or services that are legally binding , the largest of which are orders for aircraft , engines , and parts . as of december 31 , 2010 , we have firm commitments to purchase 20 boeing 767-300er freighters to be delivered between 2011 and 2013 , and two boeing 747-400f aircraft scheduled for delivery during 2011 . these aircraft purchase orders will provide for the replacement of existing capacity and anticipated future growth . pension fundings represent the anticipated required cash contributions that will be made to our qualified pension plans . these contributions include those to the ups ibt pension plan , which was established upon ratification of the national master agreement with the teamsters , as well as the ups pension plan . these plans are discussed further in note 5 to the consolidated financial statements . the pension funding requirements were estimated under the provisions of the pension protection act of 2006 and the employee retirement income security act of 1974 , using discount rates , asset returns , and other assumptions appropriate for these plans . to the extent that the funded status of these plans in future years differs from our current projections , the actual contributions made in future years could materially differ from the amounts shown in the table above . additionally , we have not included minimum funding requirements beyond 2015 , because these projected contributions are not reasonably determinable . we are not subject to any minimum funding requirement for cash contributions in 2011 in the ups retirement plan or ups pension plan . the amount of any minimum funding requirement , as applicable , for these plans could change significantly in future periods , depending on many factors , including future plan asset returns and discount rates . a sustained significant decline in the world equity markets , and the resulting impact on our pension assets and investment returns , could result in our domestic pension plans being subject to significantly higher minimum funding requirements . such an outcome could have a material adverse impact on our financial position and cash flows in future periods . the contractual payments due for 201cother liabilities 201d primarily include commitment payments related to our investment in certain partnerships . the table above does not include approximately $ 284 million of liabilities for .

Question: what percentage of contractual obligations and commitments in total are debt principal and debt interest?
Answer: 72%