Lap one
1970 to 1974, 28 films.
Lap two
1975 to 1979, 30 films.
Lap three
1980 to 1984, 30 films.
Lap four
1985 to 1989, 73 films, the fullest of the four.
The four laps
How the twenty years are divided.
How the twenty years are divided.
1970 to 1974, 28 films.
1975 to 1979, 30 films.
1980 to 1984, 30 films.
1985 to 1989, 73 films, the fullest of the four.
