Table:
text: Jean-François Baldé
Motorcycle Grand Prix results
Motorcycle Grand Prix results
Year_ Class_ Team Points Wins
1987 250cc Defi- Yamaha 6 0
1988 250cc Defi- Rotax 10 0
1989 250cc Motul Forza Shoei Yamaha 0 0

text: Jean-François Baldé
Motorcycle Grand Prix results
Motorcycle Grand Prix results
Year_ Class_ Team Points Wins
1973 500cc Yamaha 3 0
1975 250cc Yamaha 1 0
1975 350cc Yamaha 5 0
1975 500cc Yamaha 1 0
1976 250cc Yamaha 8 0
1976 350cc Yamaha 10 0
1977 250cc Kawasaki 4 0
1978 250cc Kawasaki 19 0
1979 250cc Kawasaki 29 0
1980 250cc Kawasaki 59 0
1980 350cc Kawasaki 38 0
1981 250cc Kawasaki 95 1
1981 350cc Kawasaki 49 0
1982 250cc Kawasaki 22 0
1982 350cc Kawasaki 59 3
1983 250cc Chevallier -Yamaha 32 1
1984 250cc Pernod- Yamaha 25 0
1985 250cc Pernod- Yamaha 8 0
1986 250cc Rothmans- Honda 63 0

Question: How many points did a 250cc class have a year before 1978, Yamaha as a team, and where wins were more than 0 for Jean-François Baldé?

Question: What is the average number of years when there are more than 0 wins, the class is 250cc and the points are 95 for Jean-François Baldé?