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 | Points |
| --- | --- | --- | --- | --- |
| 1964.0 | Owen Racing Organisation | BRM P67 | BRM V8 | 0.0 |
| 1965.0 | Reg Parnell Racing | Lotus 25 | BRM V8 | 2.0 |
| 1967.0 | Cooper Car Company | Cooper T81B | Maserati V12 | 0.0 |
| 1968.0 | Owen Racing Organisation | BRM P126 | BRM V12 | 6.0 |
| 1969.0 | Gold Leaf Team Lotus | Lotus 49B | Cosworth V8 | 3.0 |
| 1969.0 | Frank Williams Racing Cars | Brabham BT30 (F2) | Cosworth Straight-4 | 3.0 |
Question:
What is the earliest year that had a Lotus 49B chassis?
Answer:
1969.0