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:
| in millions                                 | 2010   | 2011   | 2012   | 2013   | 2014   | thereafter   |
|:--------------------------------------------|:-------|:-------|:-------|:-------|:-------|:-------------|
| maturities of long-term debt ( a )          | $ 304  | $ 574  | $ 199  | $ 131  | $ 562  | $ 7263       |
| debt obligations with right of offset ( b ) | 519    | 28     | 2013   | 2013   | 2013   | 5108         |
| lease obligations                           | 177    | 148    | 124    | 96     | 79     | 184          |
| purchase obligations ( c )                  | 2262   | 657    | 623    | 556    | 532    | 3729         |
| total ( d )                                 | $ 3262 | $ 1407 | $ 946  | $ 783  | $ 1173 | $ 16284      |

Question:
considering the years 2011-2012 , what is the variation observed in the lease obligations?


pre_text: contractually committed revolving bank credit agreement and $ 1.0 billion of commercial paper- based financing based on eligible receivable balan- ces under a receivables securitization program , which management believes are adequate to cover expected operating cash flow variability during the current economic cycle .
the credit agreements gen- erally provide for interest rates at a floating rate index plus a pre-determined margin dependent upon international paper 2019s credit rating .
in november 2009 , international paper replaced its $ 1.5 billion revolving bank credit agreement that was scheduled to expire in march 2011 with a new $ 1.5 billion fully committed revolving bank credit agreement that expires in november 2012 and has a facility fee of 0.50% ( 0.50 % ) payable quarterly .
the liquidity facilities also include up to $ 1.0 billion of commercial paper-based financings on eligible receivable balances ( $ 816 mil- lion at december 31 , 2009 ) under a receivables securitization program that was scheduled to expire in january 2010 with a facility fee of 0.75% ( 0.75 % ) .
on jan- uary 13 , 2010 , the company amended this program to extend the maturity date from january 2010 to january 2011 .
the amended agreement has a facility fee of 0.50% ( 0.50 % ) payable monthly .
at december 31 , 2009 , there were no borrowings under either the bank credit agreements or receivables securitization pro- the company was in compliance with all of its debt covenants at december 31 , 2009 .
the company 2019s financial covenants require the maintenance of a minimum net worth of $ 9 billion and a total- debt-to-capital ratio of less than 60% ( 60 % ) .
net worth is defined as the sum of common stock , paid-in capital and retained earnings , less treasury stock plus any cumulative goodwill impairment charges .
the calcu- lation also excludes accumulated other compre- hensive loss .
the total-debt-to-capital ratio is defined as total debt divided by the sum of total debt plus net worth .
at december 31 , 2009 , international paper 2019s net worth was $ 11.8 billion , and the total- debt-to-capital ratio was 43.3% ( 43.3 % ) .
the company will continue to rely upon debt and capital markets for the majority of any necessary long-term funding not provided by operating cash flows .
funding decisions will be guided by our capi- tal structure planning objectives .
the primary goals of the company 2019s capital structure planning are to maximize financial flexibility and preserve liquidity while reducing interest expense .
the majority of international paper 2019s debt is accessed through global public capital markets where we have a wide base of investors .
maintaining an investment grade credit rating is an important element of international paper 2019s financing strategy .
at december 31 , 2009 , the company held long-term credit ratings of bbb ( negative outlook ) and baa3 ( negative outlook ) and short-term credit ratings of a-3 and p-3 by s&p and moody 2019s , respectively .
on february 5 , 2010 , moody 2019s investor services reduced its credit rating of senior unsecured long- term debt of the royal bank of scotland n.v .
( formerly abn amro bank n.v. ) , which had issued letters of credit that support $ 1.4 billion of install- ment notes received in connection with the compa- ny 2019s 2006 sale of forestlands .
following this sale , the installment notes were contributed to third-party entities that used them as collateral for borrowings from a third-party lender .
the related loan agree- ments require that if the credit rating of any bank issuing letters of credit is downgraded below a specified level , these letters of credit must be replaced within 60 days by letters of credit from another qualifying institution .
the company expects that the issuer of installment notes will complete this replacement within the required 60-day period .
contractual obligations for future payments under existing debt and lease commitments and purchase obligations at december 31 , 2009 , were as follows : in millions 2010 2011 2012 2013 2014 thereafter maturities of long-term debt ( a ) $ 304 $ 574 $ 199 $ 131 $ 562 $ 7263 debt obligations with right of offset ( b ) 519 28 2013 2013 2013 5108 .
post_text: ( a ) total debt includes scheduled principal payments only .
the 2010 debt maturities reflect the reclassification of $ 450 million of notes payable and current maturities of long-term debt to long-term debt based on international paper 2019s intent and abil- ity to renew or convert these obligations , as evidenced by the company 2019s available bank credit agreements .
( b ) represents debt obligations borrowed from non-consolidated variable interest entities for which international paper has , and intends to affect , a legal right to offset these obligations with investments held in the entities .
accordingly , in its con- solidated balance sheet at december 31 , 2009 , international paper has offset approximately $ 5.7 billion of interests in the entities against this $ 5.7 billion of debt obligations held by the entities ( see note 12 of the notes to consolidated financial statements in item 8 .
financial statements and supplementary data ) . .
label: 24
qa: answer: 24
explanation: it is the difference between those values .
ann_table_rows: 3
steps: op: minus2-1
arg1: 148
arg2: 124
res: 24
program: subtract(148, 124)
gold_inds: table_3: in millions the lease obligations of 2010 is 177 ; the lease obligations of 2011 is 148 ; the lease obligations of 2012 is 124 ; the lease obligations of 2013 is 96 ; the lease obligations of 2014 is 79 ; the lease obligations of thereafter is 184 ;
exe_ans: 24
tfidftopn: text_23: contractual obligations for future payments under existing debt and lease commitments and purchase obligations at december 31 , 2009 , were as follows : in millions 2010 2011 2012 2013 2014 thereafter maturities of long-term debt ( a ) $ 304 $ 574 $ 199 $ 131 $ 562 $ 7263 debt obligations with right of offset ( b ) 519 28 2013 2013 2013 5108 .
table_4: in millions The purchase obligations ( c ) of 2010 is 2262 ; The purchase obligations ( c ) of 2011 is 657 ; The purchase obligations ( c ) of 2012 is 623 ; The purchase obligations ( c ) of 2013 is 556 ; The purchase obligations ( c ) of 2014 is 532 ; The purchase obligations ( c ) of thereafter is 3729 ;
program_re: subtract(148, 124)
model_input: text_23
contractual obligations for future payments under existing debt and lease commitments and purchase obligations at december 31 , 2009 , were as follows : in millions 2010 2011 2012 2013 2014 thereafter maturities of long-term debt ( a ) $ 304 $ 574 $ 199 $ 131 $ 562 $ 7263 debt obligations with right of offset ( b ) 519 28 2013 2013 2013 5108 .
table_3
in millions the lease obligations of 2010 is 177 ; the lease obligations of 2011 is 148 ; the lease obligations of 2012 is 124 ; the lease obligations of 2013 is 96 ; the lease obligations of 2014 is 79 ; the lease obligations of thereafter is 184 ;
table_5
in millions the total ( d ) of 2010 is $ 3262 ; the total ( d ) of 2011 is $ 1407 ; the total ( d ) of 2012 is $ 946 ; the total ( d ) of 2013 is $ 783 ; the total ( d ) of 2014 is $ 1173 ; the total ( d ) of thereafter is $ 16284 ;