Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Member countries | Population | Area (km²) | GDP (billion US$) | GDP per capita (US$) |
| --- | --- | --- | --- | --- |
| Austria | 8,206,524 | 83,871 | 145.238 | 18,048 |
| Finland | 5,261,008 | 338,145 | 80.955 | 15,859 |
| Sweden | 9,047,752 | 449,964 | 156.640 | 17,644 |
| Accession countries | 22,029,977 | 871,980 | 382.833 | 17,378 |
| Existing members (1995) | 350,909,402 | 2,495,174 | 5,894.232 | 16,797 |
| EU15 (1995) | 372,939,379 (+6.28%) | 3,367,154 (+34.95%) | 6,277.065 (+6.50%) | 16,831 (+0.20%) |
Question:
What is the per-capita GDP for the country with an overall GDP of 156.640?
Answer:
17644.0