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:
| Rank | Population | Name | Former Name | Municipality |
| --- | --- | --- | --- | --- |
| 14.0 | 845.0 | Qeqertarsuaq | Godhavn Lievely | Qaasuitsup |
| 15.0 | 656.0 | Qaanaaq | Thule | Qaasuitsup |
| 16.0 | 558.0 | Kangaatsiaq | — | Qaasuitsup |
| 17.0 | 512.0 | Kangerlussuaq | Bluie West-8 Søndre Strømfjord Sondrestrom | Qeqqata |
| 18.0 | 452.0 | Ittoqqortoormiit | Scoresbysund | Sermersooq |
| 19.0 | 448.0 | Kullorsuaq | — | Qaasuitsup |
| 20.0 | 353.0 | Kangaamiut | Gammel Sukkertoppen Sukkertoppen | Qeqqata |
| 21.0 | 331.0 | Kuummiit | — | Sermersooq |
| 22.0 | 267.0 | Kulusuk | Kap Dan | Sermersooq |
| 23.0 | 263.0 | Alluitsup Paa | Sydprøven | Kujalleq |
| 24.0 | 258.0 | Niaqornaarsuk | — | Qaasuitsup |
| 25.0 | 246.0 | Tasiusaq | — | Qaasuitsup |
| 26.0 | 235.0 | Saattut | — | Qaasuitsup |
| 27.0 | 231.0 | Attu | — | Qaasuitsup |
| 28.0 | 211.0 | Ikerasak | — | Qaasuitsup |
| 29.0 | 203.0 | Qeqertarsuatsiaat | Fiskenæsset | Sermersooq |
| 29.0 | 203.0 | Sermiligaaq | — | Sermersooq |
| 31.0 | 201.0 | Nuussuaq | Kraulshavn | Qaasuitsup |
Question:
What is the lowest rank of Qaanaaq, which has a population greater than 231?
Answer:
15.0