Table:
text: List of television stations in Hong Kong
Free-to-air Television
Free-to-air Television
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: List of Hong Kong TV channels, how many start dates are there for digital broadcasting?