We have 976 Grand Prix now, Ferrari was driving in 951 races. But I have 28 races without Ferrari as official team?
British Grand Prix 1950 - what was the reason?
Indy 500 1950 - almost no F1 teams at Indy (as the following years)
French Grand Prix 1950 - there was a F2 race in Reims where Ferrari was instead of...
Indy 500 1951
Indy 500 1953
Indy 500 1954
Indy 500 1955
Indy 500 1956
Indy 500 1957
Indy 500 1958
Indy 500 1959
British Grand Prix 1959 - what was the reason?
Indy 500 1960
USA Grand Prix 1960 - travel too expensive
USA Grand Prix 1961 - travel too expensive
French Grand Prix 1962 - there were some economic problems in Italy.
USA Grand Prix 1962 - travel too expensive
South Africa Grand Prix 1962 - travel too expensive
USA Grand Prix 1964 - NART was entering the cars due to an argument with ACI
Mexican Grand Prix 1964 - NART was entering the cars...
Britisch Grand Prix 1966 - there were some economic problems in Italy
South Africa Grad Prix 1967 - I think because of costs?
Monaco Grand Prix 1968 - track too dangerous for Enzo after Bandini died in an accident one year before
German Grand Prix 1969 - car not good enough, testing for Italy Grand Prix
Dutch Grand Prix 1973 - car too bad
German Grand Prix 1973 - car too bad
Austrian Grand Prix 1976 - after Lauda crash
Belgian Grand Prix 1982 - after Villeneuve crash