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 | No. in season | Title | Directed by | Written by | Original air date | Production code |
| --- | --- | --- | --- | --- | --- | --- |
| 53.0 | 1.0 | "First Day of School" | James Widdoes | Kathy Ann Stumpe | September24,2004 | 302.0 |
| 54.0 | 2.0 | "Changes" | James Widdoes | Seth Kurland | October1,2004 | 301.0 |
| 55.0 | 3.0 | "School Nurse" | James Widdoes | Rob Hanning | October8,2004 | 303.0 |
| 56.0 | 4.0 | "Out of the Box" | James Widdoes | Martin Weiss | October15,2004 | 304.0 |
| 57.0 | 5.0 | "Car Trouble" | James Widdoes | Hayes Jackson | October22,2004 | 305.0 |
| 58.0 | 6.0 | "Halloween" | Lynn McCracken | Steve Baldikoski & Bryan Behar | October29,2004 | 306.0 |
| 59.0 | 7.0 | "Coach" "Tennis Coach" | James Widdoes | Laurie Gelman | November5,2004 | 307.0 |
| 60.0 | 8.0 | "Secrets" | James Widdoes | Bonnie Kallman | November12,2004 | 308.0 |
| 62.0 | 10.0 | "Vanity Unfair" | James Widdoes | Paul Ciancarelli & David Dipietro | December3,2004 | 309.0 |
| 63.0 | 11.0 | "Princeton Girl" | James Widdoes | Tamiko K. Brooks | December10,2004 | 311.0 |
| 64.0 | 12.0 | "A Very C.J. Christmas" "A Very Cool Christmas" | James Widdoes | Kathy Ann Stumpe | December17,2004 | 312.0 |
| 65.0 | 13.0 | "The Sub" | James Widdoes | Steve Baldikoski & Bryan Behar | January7,2005 | 313.0 |
| 66.0 | 14.0 | "C.J.'s Temptation" | James Widdoes | Steve Baldikoski & Bryan Behar | January7,2005 | 314.0 |
| 67.0 | 15.0 | "Old Flame" | James Widdoes | John Peaslee & Judd Pillot | January14,2005 | 315.0 |
| 68.0 | 16.0 | "Closure" | James Widdoes | Seth Kurland | January21,2005 | 316.0 |
| 69.0 | 17.0 | "Volleybrawl" | Barnet Kellman | Hayes Jackson | January28,2005 | 317.0 |
| 70.0 | 18.0 | "Freaky Friday" | James Widdoes | W. Bruce Cameron | February4,2005 | 318.0 |
| 71.0 | 19.0 | "Torn Between Two Lovers" | James Widdoes | John Peaslee & Judd Pillot | February11,2005 | 319.0 |
| 72.0 | 20.0 | "C.J.'s Real Dad" | James Widdoes | Rob Hanning | February18,2005 | 320.0 |
| 73.0 | 21.0 | "The After Party" | Patricia Doak | Grant Nieporte & Robert Spina | March4,2005 | 322.0 |
| 74.0 | 22.0 | "The Teachers Lounge" | James Widdoes | Paul Ciancarelli & David Dipietro | April1,2005 | 323.0 |
| 75.0 | 23.0 | "The Sleepover" | James Widdoes | John Peaslee & Judd Pillot | April8,2005 | 321.0 |
Question:
How many production codes are there for "the sub"?
Answer:
1.0