I think I included French Soldiers in Algeria in my figure (fail on my part), your right, French made up about 10% of the Population
Even with soldiers, you wouldn't have 16% of the population. French Algeria had around 10 millions of inhabitants in 1950's.
For Oran, however, I disagree
These are the official statistic of 1959.
In 1950, Oran has 256,661 inhabitants. Sixty-five percent of the total of Europeans is of Spanish origin more than the total number of Muslims in the city.
65%? It's certainly slightly overestimated.
For Jordi, the proportion in Oranie is something like that.
1910 :
218 000 "Legal French" /
93 000 Spanish
1930 :
273 000 /
78 000
Of course, it doesn't count the french population of spanish origin, but as it was integrated, it would make little sense.
That said, we could count it, for sake of it.
1910 : 110 000 /
108 000 / 93 000
1930 : 120 000 /
153 000 / 78 000
In 1961, The census stated the population of Oran was about 400,000 inhabitants: 220,000 Europeans and 180,000 Muslims
Post-1960 statistics are exceptionals : you had a rural exode of european population that made cities overpopulated with non-Muslim population.
They aren't representative of the historical demographies.
EDIT : Without counting the people that was in metropole during this time : my father and part of his sisters were sent in France after some times, while the situation became really perillous. Even the 1959 Statistics could be criticised as not that representative, while they are certainly more accurate (as made before 1959 partially) than the 60's one.