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:
| Order | Episode | Original airdate | Timeslot | Viewers (100000s) | Nightly rank | Weekly rank |
| --- | --- | --- | --- | --- | --- | --- |
| 1.0 | "818-Jklpuzo" | September 28, 2009 | Monday 8:00 pm – 8:30 pm | 13.27 | 6.0 | 16.0 |
| 2.0 | "Whipped Unto the Third Generation" | October 19, 2009 | Monday 7:30 pm – 8:00 pm | 14.36 | 1.0 | 3.0 |
| 3.0 | "Mmm, fish. Yum." | October 26, 2009 | Monday 7:30 pm – 8:00 pm | 14.38 | 2.0 | 6.0 |
| 4.0 | "Laxative Tester, Horse Inseminator" | November 2, 2009 | Monday 7:30 pm – 8:00 pm | 13.69 | 2.0 | 8.0 |
| 5.0 | "For the Sake of the Child" | November 9, 2009 | Monday 7:30 pm – 8:00 pm | 14.55 | 1.0 | 4.0 |
| 6.0 | "Give Me Your Thumb" | November 16, 2009 | Monday 7:30 pm – 8:00 pm | 14.62 | 1.0 | 3.0 |
| 7.0 | "Untainted by Filth" | November 23, 2009 | Monday 7:30 pm – 8:00 pm | 12.76 | 4.0 | 10.0 |
| 8.0 | "Gorp. Fnark. Shmegle" | February 1, 2010 | Monday 7:30 pm – 8:00 pm | 15.19 | 1.0 | 3.0 |
| 9.0 | "Captain Terry's Spray-On Hair" | February 8, 2010 | Monday 7:30 pm – 8:00 pm | 14.20 | 1.0 | 2.0 |
| 10.0 | "That's Why They Call it Ball Room" | February 15, 2010 | Monday 7:30 pm – 8:00 pm | 13.26 | 3.0 | 8.0 |
| 11.0 | "Warning, It's Dirty" | February 22, 2010 | Monday 7:30 pm – 8:00 pm | 13.97 | 1.0 | 1.0 |
Question:
What is the highest numbered nightly rank for any episode? 
Answer:
6.0