You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
Catalan_language

Context:
Following the French capture of Algeria (1833), that region saw several waves of Catalan-speaking settlers. People from the Spanish Alacant province settled around Oran, whereas Algiers received immigration from Northern Catalonia and Minorca. Their speech was known as patuet. By 1911, the number of Catalan speakers was around 100,000. After the declaration of independence of Algeria in 1962, almost all the Catalan speakers fled to Northern Catalonia (as Pieds-Noirs) or Alacant.

Question:
When did most Catalan speakers leave northern Catalonia?

1962