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:
| Name | Employed | Position held | Honour | Citation |
| --- | --- | --- | --- | --- |
| Davis, Phillip Harris (Phil) | 1951–2000 | Mathematics & Prefect Master | Medal of the Order of Australia | It's an Honour |
| Morgan, Michael Dennis | 1981–2001 | Physical Education Ist VIII Coach | Medal of the Order of Australia | It's an Honour |
| Swain, Elizabeth Anne (Liz) | 1973–1995 | Director of Music & Chapel Choir | Medal of the Order of Australia | It's an Honour |
| Swain, Peter Leonard | 1970–1996 | Chaplain & Archivist | Medal of the Order of Australia | It's an Honour |
| Woosnam, Clive Thomas | 1970–2005 | Senior Boarding Master & Registrar | Medal of the Order of Australia | It's an Honour |
| Zimmerman, Roy Alfred | 1966–1996 | Master-in-Charge Wyvern House | Medal of the Order of Australia | It's an Honour |
Question:
What are the years employed shown for mathematics & prefect master?
Answer:
1951–2000