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:
| # | Episode | Air Date | Timeslot (EST) | Rating | Share | 18-49 (Rating/Share) | Viewers (m) | Weekly Rank (#) |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 2.0 | "In Which Sam Receives an Unexpected Visitor" | October 3, 2007 | Wednesday 9:00 P.M. | 8.3 | 13.0 | 4.3/13 | 12.3 | 17.0 |
| 3.0 | "In Which Addison Finds the Magic" | October 10, 2007 | Wednesday 9:00 P.M. | 8.2 | 13.0 | 4.8/12 | 12.4 | 18.0 |
| 4.0 | "In Which Addison Has a Very Casual Get Together" | October 17, 2007 | Wednesday 9:00 P.M. | 8.1 | 13.0 | 4.3/11 | 11.81 | 23.0 |
| 5.0 | "In Which Addison Finds a Showerhead" | October 24, 2007 | Wednesday 9:00 P.M. | 8.1 | 12.0 | 4.5/11 | 11.77 | 24.0 |
| 6.0 | "In Which Charlotte Goes Down the Rabbit Hole" | October 31, 2007 | Wednesday 9:00 P.M. | 7.7 | 13.0 | 3.8/10 | 11.21 | 25.0 |
| 7.0 | "In Which Sam Gets Taken For A Ride" | November 14, 2007 | Wednesday 9:00 P.M. | 7.9 | 12.0 | 4.2/10 | 11.45 | 22.0 |
| 8.0 | "In Which Cooper Finds a Port In His Storm" | November 21, 2007 | Wednesday 9:00 P.M. | 5.7 | 9.0 | 2.6/8 | 8.44 | 41.0 |
Question:
How many share figures are there for the episode that aired on October 17, 2007?
Answer:
1.0