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:
| Ch № | Channel | Channel content | Transmission | Format | Launch Date | Licence |
| --- | --- | --- | --- | --- | --- | --- |
| 1 (A); 81 (D) | TVB Jade | TVB's main Chinese ( Cantonese ) channel. | Analog & Digital | SDTV | 19 November 1967 | TVB |
| 2 (A); 11 (D) | ATV Home | ATV's main Chinese (Cantonese) channel. | Analog & Digital | SDTV | 29 May 1957 | ATV |
| 3 (A); 84 (D) | TVB Pearl | TVB's main English channel. | Analog & Digital | HDTV | 19 November 1967 | TVB |
| 4 (A); 16 (D) | ATV World | ATV's main English channel. | Analog & Digital | SDTV | 29 May 1957 | ATV |
| 32 (D) | RTHK 1 | RTHK's main Cantonese and English channel. | Digital | HDTV | 9 January 2013 | RTHK |
| 83 (D); 522 (M) | TVB iNews | A 24-hour news channel broadcasting in Cantonese. | Digital & Mobile | HDTV | 11 November 2008 | TVB |
Question:
How many launch dates are there for digital transmission?
Answer:
1.0