user
Instruction
Answer the question based on the provided table.


Table
Table Title: Banat Bulgarians
Table Content:
| Source | Date | Population\nRomania | Population\nSerbia | Notes |
| --- | --- | --- | --- | --- |
| Jozu Rill | 1864 | 30,000–35,000 | 30,000–35,000 |  |
| Hungarian statistics | 1880 | 18,298 | 18,298 |  |
| Hungarian statistics | 1900 | 19,944 | 19,944 |  |
| Hungarian statistics | 1910 | 13,536 | 13,536 | "evidently underestimated" |
| Various authors | second half\nof the 19th century | 22,000–26,000 | 22,000–26,000 | "sometimes including the Krashovani" |
| Romanian census | 1930 | 10,012 |  | Romanian Banat only |
| Dimo Kazasov | 1936 |  | 3,200 | Serbian Banat only; estimated |
| Romanian census | 1939 | 9,951 |  | Romanian Banat only |
| Karol Telbizov | 1940 | 12,000 |  | Romanian Banat only; estimated |
| Mihail Georgiev | 1942 |  | up to 4,500 | Serbian Banat only; estimated |
| Romanian census | 1956 | 12,040 |  | Romania only |
| Yugoslav census | 1971 |  | 3,745 | Serbian Banat only |
| Romanian census | 1977 | 9,267 |  | Romania only |
| Romanian census | 2002 | 6,486 |  | Romania only |
| Serbian census | 2002 |  | 1,658 | Serbia only |


Question
what is the average population of banat bulgarians in romania from 1880 to 1910?


Answer Format
The final answer should be concise and use the following format:
```json
{
    "answer": [
        "answer1",
        "answer2",
        ...
    ]
}
```
rule
["17,259"]