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. | # | Title | Director | Writer(s) | Original air date | Prod. code | U.S. viewers (million) |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 44.0 | 1.0 | "Those Lazy-Hazy-Crazy Days" | Amy Sherman-Palladino | Amy Sherman-Palladino | September24,2002 | 175001.0 | 5.7 |
| 45.0 | 2.0 | "Haunted Leg" | Chris Long | Amy Sherman-Palladino | October1,2002 | 175002.0 | 5.8 |
| 46.0 | 3.0 | "Application Anxiety" | Gail Mancuso | Daniel Palladino | October8,2002 | 175003.0 | 5.2 |
| 47.0 | 4.0 | "One's Got Class and the Other One Dyes" | Steve Robman | Daniel Palladino | October15,2002 | 175004.0 | 5.4 |
| 48.0 | 5.0 | "Eight O'Clock at the Oasis" | Joe Ann Fogle | Justin Tanner | October22,2002 | 175005.0 | 5.5 |
| 49.0 | 6.0 | "Take the Deviled Eggs..." | Jamie Babbit | Daniel Palladino | November5,2002 | 175006.0 | 5.5 |
| 50.0 | 7.0 | "They Shoot Gilmores, Don't They?" | Kenny Ortega | Amy Sherman-Palladino | November12,2002 | 175007.0 | 5.7 |
| 51.0 | 8.0 | "Let the Games Begin" | Steve Robman | Amy Sherman-Palladino, Sheila R. Lawrence | November19,2002 | 175008.0 | 5.7 |
| 52.0 | 9.0 | "A Deep-Fried Korean Thanksgiving" | Kenny Ortega | Daniel Palladino | November26,2002 | 175009.0 | 5.4 |
| 53.0 | 10.0 | "That'll Do, Pig" | Jamie Babbit | Sheila R. Lawrence | January14,2003 | 175010.0 | 5.5 |
| 54.0 | 11.0 | "I Solemnly Swear" | Carla McCloskey | John Stephens | January21,2003 | 175011.0 | 4.8 |
| 55.0 | 12.0 | "Lorelai Out of Water" | Jamie Babbit | Janet Leahy | January28,2003 | 175012.0 | 4.9 |
| 56.0 | 13.0 | "Dear Emily and Richard" | Gail Mancuso | Amy Sherman-Palladino | February4,2003 | 175013.0 | 5.3 |
| 57.0 | 14.0 | "Swan Song" | Chris Long | Daniel Palladino | February11,2003 | 175014.0 | 5.1 |
| 58.0 | 15.0 | "Face-Off" | Kenny Ortega | John Stephens | February18,2003 | 175015.0 | 5.3 |
| 59.0 | 16.0 | "The Big One" | Jamie Babbit | Amy Sherman-Palladino | February25,2003 | 175016.0 | 5.7 |
| 60.0 | 17.0 | "A Tale of Poes and Fire" | Chris Long | Daniel Palladino | April15,2003 | 175017.0 | 4.0 |
| 61.0 | 18.0 | "Happy Birthday, Baby" | Gail Mancuso | Amy Sherman-Palladino | April22,2003 | 175018.0 | 4.6 |
| 62.0 | 19.0 | "Keg! Max!" | Chris Long | Daniel Palladino | April29,2003 | 175019.0 | 5.3 |
| 63.0 | 20.0 | "Say Goodnight, Gracie" | Jamie Babbit | Janet Leahy, Amy Sherman-Palladino | May6,2003 | 175020.0 | 4.9 |
| 64.0 | 21.0 | "Here Comes the Son" | Amy Sherman-Palladino | Amy Sherman-Palladino | May13,2003 | 175021.0 | 5.0 |
Question:
How many production codes are there for episode number 45?
Answer:
1.0