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:
| Year | Date | Winner | Result | Loser | Location |
| --- | --- | --- | --- | --- | --- |
| 1990.0 | November 4 | Kansas City Chiefs | 9–7 | Los Angeles Raiders | Arrowhead Stadium |
| 1990.0 | November 25 | Kansas City Chiefs | 27–24 | Los Angeles Raiders | Los Angeles Memorial Coliseum |
| 1991.0 | October 28 | Kansas City Chiefs | 24–21 | Los Angeles Raiders | Arrowhead Stadium |
| 1991.0 | December 22 | Kansas City Chiefs | 27–21 | Los Angeles Raiders | Los Angeles Memorial Coliseum |
| 1991.0 | December 28 | Kansas City Chiefs | 10–6 | Los Angeles Raiders | Arrowhead Stadium |
| 1992.0 | September 28 | Kansas City Chiefs | 27–7 | Los Angeles Raiders | Arrowhead Stadium |
| 1992.0 | December 6 | Los Angeles Raiders | 28–7 | Kansas City Chiefs | Los Angeles Memorial Coliseum |
| 1993.0 | October 3 | Kansas City Chiefs | 24–9 | Oakland Raiders | Arrowhead Stadium |
| 1993.0 | November 14 | Kansas City Chiefs | 31–20 | Los Angeles Raiders | Los Angeles Memorial Coliseum |
| 1994.0 | November 6 | Kansas City Chiefs | 13–3 | Los Angeles Raiders | Arrowhead Stadium |
| 1994.0 | December 24 | Kansas City Chiefs | 19–9 | Los Angeles Raiders | Los Angeles Memorial Coliseum |
| 1995.0 | September 17 | Kansas City Chiefs | 23–17 (OT) | Oakland Raiders | Arrowhead Stadium |
| 1995.0 | December 3 | Kansas City Chiefs | 29–23 | Oakland Raiders | Oakland-Alameda County Coliseum |
| 1996.0 | September 8 | Kansas City Chiefs | 19–3 | Oakland Raiders | Arrowhead Stadium |
| 1996.0 | December 9 | Oakland Raiders | 26–7 | Kansas City Chiefs | Oakland-Alameda County Coliseum |
| 1997.0 | September 8 | Kansas City Chiefs | 28–27 | Oakland Raiders | Oakland-Alameda County Coliseum |
| 1997.0 | December 7 | Kansas City Chiefs | 30–0 | Oakland Raiders | Arrowhead Stadium |
| 1998.0 | September 6 | Kansas City Chiefs | 28–8 | Oakland Raiders | Arrowhead Stadium |
| 1998.0 | December 26 | Kansas City Chiefs | 31–24 | Oakland Raiders | Oakland-Alameda County Coliseum |
| 1999.0 | November 28 | Kansas City Chiefs | 37–34 | Oakland Raiders | Network Associates Coliseum |
| 1999.0 | January 2 (2000) | Oakland Raiders | 41–38 (OT) | Kansas City Chiefs | Arrowhead Stadium |
Question:
What is the average year of the games with the date December 26?
Answer:
1998.0