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 |
| --- | --- | --- | --- | --- |
| 1953.0 | HW Motors | HWM 53 | Alta | 0.0 |
| 1953.0 | Connaught Engineering | Connaught Type A | Lea Francis | 0.0 |
| 1955.0 | Connaught Engineering | Connaught Type B | Alta | 0.0 |
| 1956.0 | Connaught Engineering | Connaught Type B | Alta | 5.0 |
| 1957.0 | Owen Racing Organisation | BRM P25 | BRM | 0.0 |
| 1958.0 | BC Ecclestone | Connaught Type B | Alta | 0.0 |
| 1958.0 | Cooper Car Company | Cooper T45 | Coventry Climax | 0.0 |
| 1959.0 | High Efficiency Motors | Cooper T45 | Coventry Climax | 0.0 |
| 1959.0 | High Efficiency Motors | Cooper T45 | Maserati | 0.0 |
| 1960.0 | CT Atkins | Cooper T51 | Coventry Climax | 0.0 |
| 1961.0 | Rob Walker Racing | Ferguson P99 | Coventry Climax | 0.0 |
| 1961.0 | Fred Tuck Cars | Cooper T45 | Coventry Climax | 0.0 |
Question:
How many points did Connaught Type A chassis earn on average before 1955?
Answer:
0.0