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:
| Character | Actor | Years | Series | Episode Count |
| --- | --- | --- | --- | --- |
| Dr Nikki Alexander | Emilia Fox | 2004- | 8.5- | 86.0 |
| Dr Jack Hodgson | David Caves | 2013- | 16.1- | 10.0 |
| Dr. Clarissa Mullery | Liz Carr | 2013– | 16.1- | 10.0 |
| Dr Thomas Chamberlain | Richard Lintern | 2014- | 17.?- | 0.0 |
| Professor Sam Ryan | Amanda Burton | 1996-2004 | 1.1-8.2 | 54.0 |
| Professor Leo Dalton | William Gaminara | 2002–2013 | 6.1-16.10 | 106.0 |
| Dr Harry Cunningham | Tom Ward | 2002-2012 | 6.1-15.10 | 96.0 |
| Dr Trevor Stewart | William Armstrong | 1996-1998 | 1.1-3.8 | 24.0 |
Question:
Which Years have a Character of dr trevor stewart?
Answer:
1996-1998