credit lines devon has a $ 3.0 billion syndicated , unsecured revolving line of credit ( the 201csenior credit facility 201d ) . the senior credit facility has an initial maturity date of october 24 , 2017 . however , prior to the maturity date , devon has the option to extend the maturity for up to two additional one-year periods , subject to the approval of the lenders . amounts borrowed under the senior credit facility may , at the election of devon , bear interest at various fixed rate options for periods of up to twelve months . such rates are generally less than the prime rate . however , devon may elect to borrow at the prime rate . the senior credit facility currently provides for an annual facility fee of $ 3.8 million that is payable quarterly in arrears . as of december 31 , 2012 , there were no borrowings under the senior credit facility . the senior credit facility contains only one material financial covenant . this covenant requires devon 2019s ratio of total funded debt to total capitalization , as defined in the credit agreement , to be no greater than 65 percent . the credit agreement contains definitions of total funded debt and total capitalization that include adjustments to the respective amounts reported in the accompanying financial statements . also , total capitalization is adjusted to add back noncash financial write-downs such as full cost ceiling impairments or goodwill impairments . as of december 31 , 2012 , devon was in compliance with this covenant with a debt-to- capitalization ratio of 25.4 percent . commercial paper devon has access to $ 5.0 billion of short-term credit under its commercial paper program . commercial paper debt generally has a maturity of between 1 and 90 days , although it can have a maturity of up to 365 days , and bears interest at rates agreed to at the time of the borrowing . the interest rate is generally based on a standard index such as the federal funds rate , libor , or the money market rate as found in the commercial paper market . as of december 31 , 2012 , devon 2019s weighted average borrowing rate on its commercial paper borrowings was 0.37 percent . other debentures and notes following are descriptions of the various other debentures and notes outstanding at december 31 , 2012 , as listed in the table presented at the beginning of this note. .
devon energy corporation and subsidiaries notes to consolidated financial statements 2013 ( continued ) debt maturities as of december 31 , 2012 , excluding premiums and discounts , are as follows ( in millions ) : .
what percentage of total debt maturity occurred in 2018 and thereafter?
2013 the 2018 and thereafter of $ 3189 is 6725 ; 2013 the total of $ 3189 is $ 11664 ; devon energy corporation and subsidiaries notes to consolidated financial statements 2013 ( continued ) debt maturities as of december 31 , 2012 , excluding premiums and discounts , are as follows ( in millions ) : .
2013 $ 3189
2014 500
2015 2014
2016 500
2017 750
2018 and thereafter 6725
total $ 11664