Task: Table-QA (source dataset: TableBench)

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:
|   Unnamed: 0 |   Average population (x 1000) |   Live births |   Deaths | Natural change   |   Crude birth rate (per 1000) |   Crude death rate (per 1000) |   Natural change (per 1000) |
|-------------:|------------------------------:|--------------:|---------:|:-----------------|------------------------------:|------------------------------:|----------------------------:|
|         1970 |                            31 |           683 |      356 | 327              |                          22   |                          11.5 |                        10.5 |
|         1975 |                            33 |           706 |      374 | 332              |                          21.4 |                          11.3 |                        10.1 |
|         1980 |                            35 |           701 |      351 | 350              |                          20   |                          10   |                        10   |
|         1985 |                            37 |           793 |      289 | 504              |                          21.4 |                           7.8 |                        13.6 |
|         1990 |                            38 |           635 |      342 | 293              |                          16.9 |                           9.1 |                         7.8 |
|         1991 |                            38 |           623 |      350 | 273              |                          16.6 |                           9.3 |                         7.3 |
|         1992 |                            37 |           611 |      369 | 242              |                          16.7 |                          10.1 |                         6.6 |
|         1993 |                            34 |           459 |      433 | 26               |                          13.3 |                          12.6 |                         0.8 |
|         1994 |                            32 |           433 |      460 | - 27             |                          13.5 |                          14.3 |                        -0.8 |
|         1995 |                            31 |           382 |      481 | - 99             |                          12.5 |                          15.8 |                        -3.2 |
|         1996 |                            29 |           374 |      436 | - 62             |                          12.7 |                          14.8 |                        -2.1 |
|         1997 |                            29 |           373 |      400 | - 27             |                          13   |                          13.9 |                        -0.9 |
|         1998 |                            28 |           396 |      355 | 41               |                          14.2 |                          12.7 |                         1.5 |
|         1999 |                            27 |           319 |      397 | - 78             |                          11.8 |                          14.7 |                        -2.9 |
|         2000 |                            26 |           289 |      391 | - 102            |                          11   |                          14.9 |                        -3.9 |
|         2001 |                            26 |           298 |      390 | - 92             |                          11.6 |                          15.1 |                        -3.6 |
|         2002 |                            25 |           310 |      376 | - 66             |                          12.3 |                          14.9 |                        -2.6 |
|         2003 |                            24 |           268 |      462 | - 194            |                          11   |                          19   |                        -8   |
|         2004 |                            24 |           339 |      463 | - 124            |                          14.4 |                          19.7 |                        -5.3 |
|         2005 |                            23 |           294 |      466 | - 172            |                          12.9 |                          20.5 |                        -7.6 |
|         2006 |                            22 |           270 |      366 | - 96             |                          12.3 |                          16.7 |                        -4.4 |
|         2007 |                            21 |           280 |      351 | - 71             |                          13.2 |                          16.5 |                        -3.3 |
|         2008 |                            20 |           267 |      368 | - 101            |                          13   |                          18   |                        -4.9 |
|         2009 |                            20 |           268 |      365 | - 97             |                          13.6 |                          18.5 |                        -4.9 |
|         2010 |                            19 |           233 |      397 | - 164            |                          12.3 |                          20.9 |                        -8.7 |

Question:
In which year did the crude birth rate (per 1000) exceed the crude death rate (per 1000) by the largest margin?


id: 9ecabd8f7a2216e40154f32530e59947
qtype: NumericalReasoning
label: 1985