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 )   | 2018   | 2017   |
|:--------------------|:-------|:-------|
| new jersey chrome   | $ 151  | $ 136  |
| glass and chemical  | 90     | 71     |
| other               | 50     | 51     |
| total               | $ 291  | $ 258  |
| current portion     | $ 105  | $ 73   |

Question:
what percent of total reserves for environmental contingencies are related to glass and chemical in 2018?


pre_text: 2018 ppg annual report and form 10-k 83 current open and active claims post-pittsburgh corning bankruptcy the company is aware of approximately 460 open and active asbestos-related claims pending against the company and certain of its subsidiaries .
these claims consist primarily of non-pc relationship claims and claims against a subsidiary of ppg .
the company is defending the remaining open and active claims vigorously .
since april 1 , 2013 , a subsidiary of ppg has been implicated in claims alleging death or injury caused by asbestos-containing products manufactured , distributed or sold by a north american architectural coatings business or its predecessors which was acquired by ppg .
all such claims have been either served upon or tendered to the seller for defense and indemnity pursuant to obligations undertaken by the seller in connection with the company 2019s purchase of the north american architectural coatings business .
the seller has accepted the defense of these claims subject to the terms of various agreements between the company and the seller .
the seller 2019s defense and indemnity obligations in connection with newly filed claims ceased with respect to claims filed after april 1 , 2018 .
ppg has established reserves totaling approximately $ 180 million for asbestos-related claims that would not be channeled to the trust which , based on presently available information , we believe will be sufficient to encompass all of ppg 2019s current and potential future asbestos liabilities .
these reserves include a $ 162 million reserve established in 2009 in connection with an amendment to the pc plan of reorganization .
these reserves , which are included within other liabilities on the accompanying consolidated balance sheets , represent ppg 2019s best estimate of its liability for these claims .
ppg does not have sufficient current claim information or settlement history on which to base a better estimate of this liability in light of the fact that the bankruptcy court 2019s injunction staying most asbestos claims against the company was in effect from april 2000 through may 2016 .
ppg will monitor the activity associated with its remaining asbestos claims and evaluate , on a periodic basis , its estimated liability for such claims , its insurance assets then available , and all underlying assumptions to determine whether any adjustment to the reserves for these claims is required .
the amount reserved for asbestos-related claims by its nature is subject to many uncertainties that may change over time , including ( i ) the ultimate number of claims filed ; ( ii ) the amounts required to resolve both currently known and future unknown claims ; ( iii ) the amount of insurance , if any , available to cover such claims ; ( iv ) the unpredictable aspects of the litigation process , including a changing trial docket and the jurisdictions in which trials are scheduled ; ( v ) the outcome of any trials , including potential judgments or jury verdicts ; ( vi ) the lack of specific information in many cases concerning exposure for which ppg is allegedly responsible , and the claimants 2019 alleged diseases resulting from such exposure ; and ( vii ) potential changes in applicable federal and/or state tort liability law .
all of these factors may have a material effect upon future asbestos- related liability estimates .
as a potential offset to any future asbestos financial exposure , under the pc plan of reorganization ppg retained , for its own account , the right to pursue insurance coverage from certain of its historical insurers that did not participate in the pc plan of reorganization .
while the ultimate outcome of ppg 2019s asbestos litigation cannot be predicted with certainty , ppg believes that any financial exposure resulting from its asbestos-related claims will not have a material adverse effect on ppg 2019s consolidated financial position , liquidity or results of operations .
environmental matters it is ppg 2019s policy to accrue expenses for environmental contingencies when it is probable that a liability has been incurred and the amount of loss can be reasonably estimated .
reserves for environmental contingencies are exclusive of claims against third parties and are generally not discounted .
in management 2019s opinion , the company operates in an environmentally sound manner and the outcome of the company 2019s environmental contingencies will not have a material effect on ppg 2019s financial position or liquidity ; however , any such outcome may be material to the results of operations of any particular period in which costs , if any , are recognized .
management anticipates that the resolution of the company 2019s environmental contingencies will occur over an extended period of time .
as of december 31 , 2018 and 2017 , ppg had reserves for environmental contingencies associated with ppg 2019s former chromium manufacturing plant in jersey city , n.j .
( 201cnew jersey chrome 201d ) and for other environmental contingencies , including national priority list sites and legacy glass and chemical manufacturing sites .
these reserves are reported as accounts payable and accrued liabilities and other liabilities in the accompanying consolidated balance sheet .
environmental reserves .
post_text: notes to the consolidated financial statements .
label: 0.30928
qa: answer: 31%
ann_table_rows: 2
5
steps: op: divide2-1
arg1: 90
arg2: 291
res: 31%
program: divide(90, 291)
gold_inds: table_2: ( $ in millions ) the glass and chemical of 2018 is 90 ; the glass and chemical of 2017 is 71 ;
table_5: ( $ in millions ) the current portion of 2018 is $ 105 ; the current portion of 2017 is $ 73 ;
table_4: ( $ in millions ) the total of 2018 is $ 291 ; the total of 2017 is $ 258 ;
exe_ans: 0.30928
program_re: divide(90, 291)
model_input: text_23
environmental reserves .
table_2
( $ in millions ) the glass and chemical of 2018 is 90 ; the glass and chemical of 2017 is 71 ;
table_4
( $ in millions ) the total of 2018 is $ 291 ; the total of 2017 is $ 258 ;