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:
| No. in series | Title | Directed by | Written by | U.S. viewers (million) | Original air date | Production code |
| --- | --- | --- | --- | --- | --- | --- |
| 1.0 | " Pilot " | Adam Bernstein | Tina Fey | 8.1 | October11,2006 | 101.0 |
| 2.0 | " The Aftermath " | Adam Bernstein | Tina Fey | 5.7 | October18,2006 | 102.0 |
| 3.0 | " Blind Date " | Adam Bernstein | John Riggi | 6.0 | October25,2006 | 103.0 |
| 4.0 | " Jack the Writer " | Gail Mancuso | Robert Carlock | 4.6 | November1,2006 | 104.0 |
| 5.0 | " Jack-Tor " | Don Scardino | Robert Carlock | 5.2 | November16,2006 | 105.0 |
| 6.0 | " Jack Meets Dennis " | Juan J. Campanella | Jack Burditt | 6.0 | November30,2006 | 106.0 |
| 7.0 | " Tracy Does Conan " | Adam Bernstein | Tina Fey | 6.8 | December7,2006 | 107.0 |
| 8.0 | " The Break-Up " | Scott Ellis | Dave Finkel & Brett Baer | 5.9 | December14,2006 | 108.0 |
| 9.0 | " The Baby Show " | Michael Engler | Jack Burditt | 5.9 | January4,2007 | 109.0 |
| 10.0 | " The Rural Juror " | Beth McCarthy | Matt Hubbard | 6.1 | January11,2007 | 110.0 |
| 11.0 | " The Head and the Hair " | Gail Mancuso | Tina Fey & John Riggi | 5.0 | January18,2007 | 111.0 |
| 12.0 | " Black Tie " | Don Scardino | Kay Cannon & Tina Fey | 5.7 | February1,2007 | 112.0 |
| 13.0 | " Up All Night " | Michael Engler | Tina Fey | 5.2 | February8,2007 | 113.0 |
| 14.0 | " The C Word " | Adam Bernstein | Tina Fey | 5.0 | February15,2007 | 114.0 |
| 15.0 | " Hard Ball " | Don Scardino | Matt Hubbard | 4.6 | February22,2007 | 115.0 |
| 16.0 | " The Source Awards " | Don Scardino | Robert Carlock & Daisy Gardner | 5.7 | March1,2007 | 116.0 |
| 17.0 | " The Fighting Irish " | Dennie Gordon | Jack Burditt | 5.2 | March8,2007 | 117.0 |
| 18.0 | " Fireworks " | Beth McCarthy | Dave Finkel & Brett Baer | 5.4 | April5,2007 | 118.0 |
| 19.0 | " Corporate Crush " | Don Scardino | John Riggi | 5.1 | April12,2007 | 119.0 |
| 20.0 | " Cleveland " | Paul Feig | Jack Burditt & Robert Carlock | 5.2 | April19,2007 | 120.0 |
Question:
How many episodes had an original air date with 5.1 million viewers
Answer:
1.0