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:
| Provider | Years | Free or pay | No. of channels | Colour | Digital | Transmission |
| --- | --- | --- | --- | --- | --- | --- |
| (Unbranded VHF collection) | 1936–1985 | Free | 2 | No | No | Analogue terrestrial |
| 405-line cable service | 1938-? | Unknown | 2 | No | No | Analogue cable |
| Virgin [analogue] | 1984–2009 | Pay | 35 | Yes | No | Analogue cable |
| Sky [analogue] | 1989–2001 | Pay | Unknown | Yes | No | Analogue satellite |
| BSB | 1990–1992 | Pay | 5 | Yes | No | Analogue satellite |
| OnDigital / ITV Digital | 1998–2002 | Pay | Unknown | Yes | Yes | Digital terrestrial |
| KIT | 1999–2006 | Pay | Unknown | Yes | Yes | IPTV |
Question:
How many analogue satellite channels does Sky [Analogue] have?
Answer:
Unknown