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 | Entrant | Chassis | Engine | Tyres | Drivers | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | Points | WCC |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1998 | Mild Seven Benetton | Benetton B198 | GC37-01 V10 | B |  | AUS | BRA | ARG | SMR | ESP | MON | CAN | FRA | GBR | AUT | GER | HUN | BEL | ITA | LUX | JPN |  | 33 | 5th |
| 1998 | Mild Seven Benetton | Benetton B198 | GC37-01 V10 | B | Giancarlo Fisichella | Ret | 6 | 7 | Ret | Ret | 2 | 2 | 9 | 5 | Ret | 7 | 8 | Ret | 8 | 6 | 8 |  | 33 | 5th |
| 1998 | Mild Seven Benetton | Benetton B198 | GC37-01 V10 | B | Alexander Wurz | 7 | 4 | 4 | Ret | 4 | Ret | 4 | 5 | 4 | 9 | 11 | 16 | Ret | Ret | 7 | 9 |  | 33 | 5th |
| 1999 | Mild Seven Benetton | Benetton B199 | FB01 V10 | B |  | AUS | BRA | SMR | MON | ESP | CAN | FRA | GBR | AUT | GER | HUN | BEL | ITA | EUR | MAL | JPN |  | 16 | 6th |
| 1999 | Mild Seven Benetton | Benetton B199 | FB01 V10 | B | Giancarlo Fisichella | 4 | Ret | 5 | 5 | 9 | 2 | Ret | 7 | 12 | Ret | Ret | 11 | Ret | Ret | 11 | 14 |  | 16 | 6th |
| 1999 | Mild Seven Benetton | Benetton B199 | FB01 V10 | B | Alexander Wurz | Ret | 7 | Ret | 6 | 10 | Ret | Ret | 10 | 5 | 7 | 7 | 14 | Ret | Ret | 8 | 10 |  | 16 | 6th |
| 2000 | Mild Seven Benetton | Benetton B200 | FB02 V10 | B |  | AUS | BRA | SMR | GBR | ESP | EUR | MON | CAN | FRA | AUT | GER | HUN | BEL | ITA | USA | JPN | MAL | 20 | 4th |
| 2000 | Mild Seven Benetton | Benetton B200 | FB02 V10 | B | Giancarlo Fisichella | 5 | 2 | 11 | 7 | 9 | 5 | 3 | 3 | 9 | Ret | Ret | Ret | Ret | 11 | Ret | 14 | 9 | 20 | 4th |
| 2000 | Mild Seven Benetton | Benetton B200 | FB02 V10 | B | Alexander Wurz | 7 | Ret | 9 | 9 | 10 | 12 | Ret | 9 | Ret | 10 | Ret | 11 | 13 | 5 | 10 | Ret | 7 | 20 | 4th |
Question:
when was the benetton b198 chassis used?
Answer:
1998