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:
| Heat | Lane | Name | Nationality | Time |
| --- | --- | --- | --- | --- |
| 6.0 | 4.0 | Lenny Krayzelburg | United States | 1:58.40 |
| 5.0 | 4.0 | Aaron Peirsol | United States | 1:59.10 |
| 6.0 | 6.0 | Cameron Delaney | Australia | 1:59.61 |
| 6.0 | 5.0 | Matt Welsh | Australia | 1:59.76 |
| 4.0 | 1.0 | Răzvan Florea | Romania | 1:59.79 |
| 4.0 | 8.0 | Örn Arnarson | Iceland | 1:59.80 |
| 5.0 | 6.0 | Emanuele Merisi | Italy | 1:59.92 |
| 6.0 | 2.0 | Sergey Ostapchuk | Russia | 2:00.17 |
| 4.0 | 4.0 | Gordan Kožulj | Croatia | 2:00.19 |
| 5.0 | 5.0 | Rogério Romero | Brazil | 2:00.48 |
| 4.0 | 6.0 | Chris Renaud | Canada | 2:00.51 |
| 5.0 | 7.0 | Marko Strahija | Croatia | 2:00.72 |
| 5.0 | 2.0 | Yoav Gath | Israel | 2:00.80 |
| 3.0 | 2.0 | Klaas-Erik Zwering | Netherlands | 2:00.94 |
| 4.0 | 3.0 | Volodymyr Nikolaychuk | Ukraine | 2:01.07 |
| 4.0 | 5.0 | Leonardo Costa | Brazil | 2:01.08 |
| 5.0 | 3.0 | Simon Dufour | France | 2:01.09 |
| 6.0 | 7.0 | Adam Ruckwood | Great Britain | 2:01.11 |
| 6.0 | 1.0 | Simon Militis | Great Britain | 2:01.20 |
| 6.0 | 8.0 | Dustin Hersee | Canada | 2:01.34 |
| 6.0 | 3.0 | Ralf Braun | Germany | 2:01.35 |
| 3.0 | 5.0 | Scott Talbot-Cameron | New Zealand | 2:01.53 |
| 3.0 | 7.0 | Blaž Medvešek | Slovenia | 2:01.67 |
| 2.0 | 2.0 | Neisser Bent | Cuba | 2:02.05 |
| 5.0 | 1.0 | Mirko Mazzari | Italy | 2:02.13 |
| 4.0 | 7.0 | Fu Yong | China | 2:02.70 |
| 3.0 | 4.0 | Markus Rogan | Austria | 2:02.84 |
| 3.0 | 3.0 | Alejandro Bermúdez | Colombia | 2:03.43 |
| 5.0 | 8.0 | Guillermo Mediano | Spain | 2:03.45 |
| 2.0 | 4.0 | Mario Carvalho | Portugal | 2:03.82 |
| 3.0 | 6.0 | Miroslav Machovič | Slovakia | 2:04.73 |
| 3.0 | 8.0 | Arūnas Savickas | Lithuania | 2:05.06 |
| 1.0 | 3.0 | Alex Fong | Hong Kong | 2:05.47 |
| 2.0 | 6.0 | Eduardo Germán Otero | Argentina | 2:05.51 |
| 2.0 | 7.0 | Torwai Sethsothorn | Thailand | 2:05.52 |
| 2.0 | 3.0 | Ahmed Hussein | Egypt | 2:06.10 |
| 2.0 | 8.0 | Gary Tan | Singapore | 2:06.32 |
| 1.0 | 4.0 | Andrei Mihailov | Moldova | 2:06.67 |
| 2.0 | 1.0 | Lee Jong-Min | South Korea | 2:07.14 |
| 1.0 | 5.0 | Ivan Angelov | Bulgaria | 2:07.30 |
| 1.0 | 7.0 | Guillermo Cabrera | Dominican Republic | 2:08.22 |
| 3.0 | 1.0 | Alex Lim Keng Liat | Malaysia | 2:08.23 |
| 1.0 | 6.0 | Miloš Cerović | Yugoslavia | 2:09.07 |
| 1.0 | 2.0 | Aleksandr Yegorov | Kyrgyzstan | 2:13.85 |
| 4.0 | 2.0 | Viktor Bodrogi | Hungary | DSQ |
| 2.0 | 5.0 | Simon Thirsk | South Africa | DNS |
Question:
How many lanes have a Nationality of united states, and a Name of aaron peirsol?
Answer:
1.0