Task: Table-QA (source dataset: FinQA)

Task: 
You are given a table containing structured data and a natural language question referring to the table. Your goal is to analyze the table and provide an accurate and concise answer based on the given data.

Instructions:
1. Understand the Table: Examine the structure, headers, and data in the table. Identify relevant columns and rows related to the question.
2. Interpret the Question: Determine whether the question requires direct retrieval, aggregation, comparison, sorting, filtering, or inference.
3. Extract the Answer: Use logical reasoning and numerical operations (if necessary) to derive the correct response from the table.
4. Format the Answer: No explanation, return the answer in a structured JSON format: {"answer": <answer>}. If the question cannot be answered due to missing or ambiguous data, return a JSON response with {"answer": null}.

Table:
| 2013                | $ 3189   |
|:--------------------|:---------|
| 2014                | 500      |
| 2015                | 2014     |
| 2016                | 500      |
| 2017                | 750      |
| 2018 and thereafter | 6725     |
| total               | $ 11664  |

Question:
what percentage of total debt maturity occurred in 2018 and thereafter?


pre_text: 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 ) : .
post_text: 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. .
label: 57.65604
qa: answer: 57.65%
ann_table_rows: 5
6
ann_text_rows: 0
steps: op: divide2-1
arg1: 6725
arg2: 11664
res: 0.5765
op: multiply2-2
arg1: #0
arg2: const_100
res: 57.65
program: divide(6725, 11664), multiply(#0, const_100)
gold_inds: table_5: 2013 the 2018 and thereafter of $ 3189 is 6725 ;
table_6: 2013 the total of $ 3189 is $ 11664 ;
text_0: 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 ) : .
exe_ans: 57.65604
program_re: multiply(divide(6725, 11664), const_100)
model_input: table_5
2013 the 2018 and thereafter of $ 3189 is 6725 ;
table_6
2013 the total of $ 3189 is $ 11664 ;
text_18
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. .