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 | Class | Team | Points | Wins |
| --- | --- | --- | --- | --- |
| 1973.0 | 500cc | Yamaha | 3.0 | 0.0 |
| 1975.0 | 250cc | Yamaha | 1.0 | 0.0 |
| 1975.0 | 350cc | Yamaha | 5.0 | 0.0 |
| 1975.0 | 500cc | Yamaha | 1.0 | 0.0 |
| 1976.0 | 250cc | Yamaha | 8.0 | 0.0 |
| 1976.0 | 350cc | Yamaha | 10.0 | 0.0 |
| 1977.0 | 250cc | Kawasaki | 4.0 | 0.0 |
| 1978.0 | 250cc | Kawasaki | 19.0 | 0.0 |
| 1979.0 | 250cc | Kawasaki | 29.0 | 0.0 |
| 1980.0 | 250cc | Kawasaki | 59.0 | 0.0 |
| 1980.0 | 350cc | Kawasaki | 38.0 | 0.0 |
| 1981.0 | 250cc | Kawasaki | 95.0 | 1.0 |
| 1981.0 | 350cc | Kawasaki | 49.0 | 0.0 |
| 1982.0 | 250cc | Kawasaki | 22.0 | 0.0 |
| 1982.0 | 350cc | Kawasaki | 59.0 | 3.0 |
| 1983.0 | 250cc | Chevallier -Yamaha | 32.0 | 1.0 |
| 1984.0 | 250cc | Pernod- Yamaha | 25.0 | 0.0 |
| 1985.0 | 250cc | Pernod- Yamaha | 8.0 | 0.0 |
| 1986.0 | 250cc | Rothmans- Honda | 63.0 | 0.0 |
| 1987.0 | 250cc | Defi- Yamaha | 6.0 | 0.0 |
| 1988.0 | 250cc | Defi- Rotax | 10.0 | 0.0 |
| 1989.0 | 250cc | Motul Forza Shoei Yamaha | 0.0 | 0.0 |
Question:
How many points numbers had a class of 250cc, a year prior to 1978, Yamaha as a team, and where wins was more than 0?
Answer:
0.0