on april 19 , 2018 , we took delivery of norwegian bliss .
to finance the payment due upon delivery , we had export financing in place for 80% ( 80 % ) of the contract price .
the associated $ 850.0 million term loan bears interest at a fixed rate of 3.92% ( 3.92 % ) with a maturity date of april 19 , 2030 .
principal and interest payments are payable semiannually .
on april 4 , 2018 , we redeemed $ 135.0 million principal amount of the $ 700.0 million aggregate principal amount of outstanding 4.75% ( 4.75 % ) senior notes due 2021 ( the 201cnotes 201d ) at a price equal to 100% ( 100 % ) of the principal amount of the notes being redeemed and paid the premium of $ 5.1 million and accrued interest of $ 1.9 million .
the redemption also resulted in a write off of $ 1.2 million of certain fees .
following the partial redemption , $ 565.0 million aggregate principal amount of notes remained outstanding .
interest expense , net for the year ended december 31 , 2018 was $ 270.4 million which included $ 31.4 million of amortization of deferred financing fees and a $ 6.3 million loss on extinguishment of debt .
interest expense , net for the year ended december 31 , 2017 was $ 267.8 million which included $ 32.5 million of amortization of deferred financing fees and a $ 23.9 million loss on extinguishment of debt .
interest expense , net for the year ended december 31 , 2016 was $ 276.9 million which included $ 34.7 million of amortization of deferred financing fees and a $ 27.7 million loss on extinguishment of debt .
certain of our debt agreements contain covenants that , among other things , require us to maintain a minimum level of liquidity , as well as limit our net funded debt-to-capital ratio , and maintain certain other ratios and restrict our ability to pay dividends .
substantially all of our ships and other property and equipment are pledged as collateral for certain of our debt .
we believe we were in compliance with our covenants as of december 31 , 2018 .
the following are scheduled principal repayments on long-term debt including capital lease obligations as of december 31 , 2018 for each of the next five years ( in thousands ) : .

year
amount
2019
$ 681218
2020
682556
2021
2549621
2022
494186
2023
434902
thereafter
1767383
total
$ 6609866

we had an accrued interest liability of $ 37.2 million and $ 31.9 million as of december 31 , 2018 and 2017 , respectively .
8 .
related party disclosures transactions with genting hk and apollo in december 2018 , as part of a public equity offering of nclh 2019s ordinary shares owned by apollo and genting hk , nclh repurchased 1683168 of its ordinary shares sold in the offering for approximately $ 85.0 million pursuant to its new repurchase program .
in march 2018 , as part of a public equity offering of nclh 2019s ordinary shares owned by apollo and genting hk , nclh repurchased 4722312 of its ordinary shares sold in the offering for approximately $ 263.5 million pursuant to its then existing share repurchase program .
in june 2012 , we exercised our option with genting hk to purchase norwegian sky .
we paid the total amount of $ 259.3 million to genting hk in connection with the norwegian sky purchase agreement as of december 31 , 2016 and no further payments are due. .

Question: what percent of long-term debt was paid off in 2021?
Answer: 38.6%
Explanation: to find the amount of long-term debt was paid off in 2021 , one has to take the payment in 2021 and divide it by the total amount of long-term debt payments .
Calculation: divide(2549621, 6609866)