1950 Italian Grand Prix

Columns: Pos | No | Driver | Constructor | Time | Gap
1 | 18 | Juan Manuel Fangio | Alfa Romeo | 1:58.6 | - | 2 | 16 | Alberto Ascari | Ferrari | 1:58.8 | + 0.2 | 3 | 10 | Nino Farina | Alfa Romeo | 2:00.2 | + 1.6 | 4 | 46 | Consalvo Sanesi | Alfa Romeo | 2:00.4 | + 1.8 | 5 | 36 | Luigi Fagioli | Alfa Romeo | 2:04.0 | + 5.4 | 6 | 48 | Dorino Serafini | Ferrari | 2:05.6 | + 7.0 | 7 | 60 | Piero Taruffi | Alfa Romeo | 2:05.8 | + 7.2

Example questions:
The driver that came in 2nd place in the qualifying of the 1950 Italian Grand Prix had won world titles in which two years ? | What year was the driver with a time gap of +14.6 in the qualifying of the 1950 Italian Grand Prix born in ? | What year did the driver in the qualifying of the 1950 Italian Grand Prix who represented the number 24 pass away in ? | What is the total winning percentage for the driver who came in first place in the qualifying of the 1950 Italian Grand Prix ?

Answers:
1952 and 1953 | 1910 | 1981 | 46.15%