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:
| Place | Player | Country | Score | To par |
| --- | --- | --- | --- | --- |
| 1 | Dustin Johnson | United States | 71-70-66=207 | –6 |
| 2 | Graeme McDowell | Northern Ireland | 71-68-71=210 | –3 |
| 3 | Tiger Woods | United States | 74-72-66=212 | –1 |
| T4 | Ernie Els | South Africa | 73-68-72=213 | E |
| T4 | Grégory Havret | France | 73-71-69=213 | E |
| 6 | Phil Mickelson | United States | 75-66-73=214 | +1 |
| T7 | Alex Čejka | Germany | 70-72-74=216 | +3 |
| T7 | Tim Clark | South Africa | 72-72-72=216 | +3 |
| T7 | Ryo Ishikawa | Japan | 70-71-75=216 | +3 |
| T10 | Martin Kaymer | Germany | 74-71-72=217 | +4 |
| T10 | Davis Love III | United States | 75-74-68=217 | +4 |
| T10 | Sean O'Hair | United States | 76-71-70=217 | +4 |
Question:
how many americans were in the top 10?
Answer:
5