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 | Lane | Name | Nationality | Time |
| --- | --- | --- | --- | --- |
| 1.0 | 4.0 | Aaron Peirsol | United States | 1:58.44 |
| 2.0 | 5.0 | Matt Welsh | Australia | 1:58.57 |
| 3.0 | 3.0 | Örn Arnarson | Iceland | 1:58.99 |
| 4.0 | 2.0 | Rogério Romero | Brazil | 1:59.69 |
| 5.0 | 7.0 | Marko Strahija | Croatia | 1:59.85 |
| 6.0 | 1.0 | Klaas-Erik Zwering | Netherlands | 2:00.06 |
| 7.0 | 6.0 | Sergey Ostapchuk | Russia | 2:00.47 |
| 8.0 | 8.0 | Leonardo Costa | Brazil | 2:02.26 |
Question:
How many lanes have a Nationality of iceland?
Answer:
3.0