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:
| city | area 1996 km² | area 2006 km² | pop. 1999 | pop. 2003 | pop. 2006 |
| --- | --- | --- | --- | --- | --- |
| Gdańsk | 265.03 | 266.0 | 457,937 | 461,011 | 456658.0 |
| Gdynia | 135.49 | 141.49 | 255,014 | 253,500 | 251844.0 |
| Sopot | 17.31 | 17.31 | 42,333 | 41,017 | 39624.0 |
| Pruszcz Gdański | 16.47 | 16.47 | 21,757 | 23,187 | 24276.0 |
| Rumia | 32.86 | 30.0 | 40 200 | 43 000 | 44551.0 |
| Reda | 26.39 | 30.0 | 17,510 | 17,868 | 18610.0 |
| Wejherowo | 25.65 | 26.0 | 47,038 | 46,900 | 45522.0 |
| Total | 513.42 | 521.27 | 884,080 | 885,240 | 881085.0 |
Question:
Which area 2006 km² has an area 1996 km² smaller than 17.31?
Answer:
16.47