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:
| Poll Source | Dates administered | Democrat: Jay Nixon | Republican: Kenny Hulshof | Lead Margin |
| --- | --- | --- | --- | --- |
| Public Policy Polling | November 2, 2008 | 57.9% | 38.4% | 19.5 |
| Survey USA | November 2, 2008 | 54% | 39% | 15 |
| Survey USA | October 26, 2008 | 55% | 38% | 17 |
| Rasmussen Reports | October 14, 2008 | 57% | 38% | 19 |
| Survey USA | September 23–24, 2008 | 54% | 37% | 17 |
| St. Louis Post Dispatch/ Research 2000 | September 22–24, 2008 | 49% | 42% | 7 |
| St. Louis Post Dispatch/ Research 2000 | September 15–18, 2008 | 50% | 43% | 7 |
| Rasmussen Reports | September 11, 2008 | 54% | 39% | 15 |
| Rasmussen Reports | August 7, 2008 | 53% | 42% | 11 |
| Survey USA | July 29–31, 2008 | 48% | 42% | 6 |
| Research 2000/ St. Louis Post-Dispatch | July 7–10, 2008 | 52% | 35% | 17 |
| Rasmussen Reports | July 7, 2008 | 49% | 38% | 11 |
| Public Policy Polling | July 2–5, 2008 | 47% | 37% | 10 |
Question:
How many different lead margins were stated in the poll administered on September 11, 2008?
Answer:
1.0