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: Beverly Perdue | Republican: Pat McCrory | Libertarian: Michael Munger | Lead Margin |
| --- | --- | --- | --- | --- | --- |
| Rasmussen Reports | October 23, 2008 | 47% | 51% | not an option | 4.0 |
| Survey USA | October 18–20, 2008 | 43% | 46% | 7% | 3.0 |
| Survey USA | October 5–6, 2008 | 45% | 46% | 4% | 1.0 |
| Rasmussen Reports | September 30, 2008 | 46% | 50% | not an option | 4.0 |
| Civitas Institute/ Tel Opinion Research | September 17–20, 2008 | 41% | 43% | 3% | 2.0 |
| Public Policy Polling | September 17–19, 2008 | 44% | 43% | not an option | 1.0 |
| Elon University | September 15–16, 2008 | 35% | 37% | not an option | 2.0 |
| Research 2000/Daily Kos | September 8–10, 2008 | 42% | 47% | not an option | 5.0 |
| Civitas Institute/ Tel Opinion Research | September 6–10, 2008 | 40% | 39% | not an option | 1.0 |
| Survey USA | September 6–8, 2008 | 41% | 49% | 5% | 8.0 |
| Garin Hart Yang | September 5–7, 2008 | 46% | 40% | not an option | 6.0 |
| Democracy Corps/ Greenberg Quinlan Rosner | August 20–26, 2008 | 46% | 46% | not an option | 0.0 |
| Public Policy Polling | August 20–23, 2008 | 43% | 38% | 4% | 5.0 |
| Survey USA | August 9–11, 2008 | 47% | 44% | 5% | 2.0 |
| Public Policy Polling | July 23–27, 2008 | 46% | 37% | 6% | 9.0 |
| Civitas Institute/ Tel Opinion Research | July 14–16, 2008 | 43% | 40% | 2% | 3.0 |
| Survey USA | July 12–14, 2008 | 47% | 46% | 3% | 1.0 |
| Public Policy Polling | June 26–29, 2008 | 42% | 41% | 5% | 1.0 |
| Civitas Institute/ Tel Opinion Research | June 11–13, 2008 | 43% | 41% | 2% | 2.0 |
| Rasmussen Reports | June 10, 2008 | 47% | 46% | not an option | 1.0 |
| Public Policy Polling | May 28–29, 2008 | 43% | 39% | 4% | 4.0 |
| Survey USA | May 17–19, 2008 | 52% | 45% | not an option | 7.0 |
| Civitas Institute/ Tel Opinion Research | May 14–17, 2008 | 43% | 42% | not an option | 1.0 |
| Public Policy Polling | May 8–9, 2008 | 45% | 45% | not an option | 0.0 |
| Rasmussen Reports | May 8, 2008 | 39% | 45% | 4% | 6.0 |
| Rasmussen Reports | March 20, 2008 | 45% | 42% | not an option | 3.0 |
| Rasmussen Reports | February 26, 2008 | 44% | 38% | not an option | 6.0 |
| Public Policy Polling | February 26, 2008 | 41% | 41% | not an option | 0.0 |
| Rasmussen Reports | January 28, 2008 | 42% | 38% | not an option | 4.0 |
| Public Policy Polling | January 21, 2008 | 41% | 39% | not an option | 2.0 |
| Rasmussen Reports | December 19, 2007 | 39% | 42% | not an option | 3.0 |
| Public Policy Polling | December 12, 2007 | 41% | 39% | not an option | 2.0 |
| Institute/ Tel Opinion Research | November 12, 2007 | 36% | 39% | not an option | 3.0 |
Question:
What is the lead margin for McCrory when he has 49%?
Answer:
8.0