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:
| Title | Series | Characters | Production Num. | Release date |
| --- | --- | --- | --- | --- |
| Big Man from the North | LT | Bosko, Honey | 4500.0 | 1931-01-XX |
| Ain't Nature Grand! | LT | Bosko | 4626.0 | 1931-03-XX |
| Ups 'n Downs | LT | Bosko, | 4640.0 | 1931-03-XX |
| Dumb Patrol | LT | Bosko, Honey | 4664.0 | 1931-05-XX |
| Yodeling Yokels | LT | Bosko, Honey | 4680.0 | 1931-06-XX |
| Bosko's Holiday | LT | Bosko, Honey | 4694.0 | 1931-07-XX |
| The Tree's Knees | LT | Bosko | 4725.0 | 1931-07-XX |
| Lady, Play Your Mandolin! | MM | Animals (cartoon character), Foxy, Roxy | 4645.0 | 1931-08-XX |
| Smile, Darn Ya, Smile! | MM | Foxy, Radio, Roxy | 4825.0 | 1931-09-05 |
| Bosko Shipwrecked | LT | Bosko | 4666.0 | 1931-09-19 |
| One More Time | MM | Foxy, Mugs, Roxy | 4851.0 | 1931-10-03 |
| Bosko the Doughboy | LT | Bosko | 5017.0 | 1931-10-17 |
| You Don't Know What You're Doin' | MM | Fluffy, Piggy , The Car | 4977.0 | 1931-10-31 |
| Bosko's Soda Fountain | LT | Bosko, | 5045.0 | 1931-11-14 |
| Hittin' the Trail for Hallelujah Land | MM | Banjo Player, Fluffy | 5025.0 | 11/28/31 |
| Bosko's Fox Hunt | LT | Bosko, Bruno | 5046.0 | 1931-12-12 |
| Red-Headed Baby | MM | Red-Headed Baby, Toymaker | 5038.0 | 1931-12-26 |
Question:
What is the smallest production number for the LT series with the Dumb Patrol title?
Answer:
4664.0