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:
| Player | Touchdowns | Extra points | Field goals | Safeties | Points |
| --- | --- | --- | --- | --- | --- |
| Bennie Oosterbaan | 8.0 | 0.0 | 0.0 | 0.0 | 48.0 |
| Benny Friedman | 3.0 | 22.0 | 2.0 | 0.0 | 46.0 |
| Bo Molenda | 6.0 | 0.0 | 0.0 | 0.0 | 36.0 |
| Bruce Gregory | 5.0 | 0.0 | 0.0 | 0.0 | 30.0 |
| Louis Gilbert | 3.0 | 2.0 | 0.0 | 0.0 | 20.0 |
| William Flora | 2.0 | 0.0 | 0.0 | 0.0 | 12.0 |
| James Miller | 1.0 | 1.0 | 0.0 | 0.0 | 7.0 |
| George Babcock | 1.0 | 0.0 | 0.0 | 0.0 | 6.0 |
| Sam Babcock | 1.0 | 0.0 | 0.0 | 0.0 | 6.0 |
| William Herrnstein | 1.0 | 0.0 | 0.0 | 0.0 | 6.0 |
| Leo Hoffman | 1.0 | 0.0 | 0.0 | 0.0 | 6.0 |
| Frederic Fuller | 0.0 | 1.0 | 0.0 | 0.0 | 1.0 |
| Carl Stamman | 0.0 | 1.0 | 0.0 | 0.0 | 1.0 |
| na | 0.0 | 0.0 | 0.0 | 1.0 | 2.0 |
Question:
How many extra points catagories are there for the na player? 
Answer:
1.0