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:
Marshall_Islands

Context:
A German trading company, the Jaluit Gesellschaft, administered the islands from 1887 until 1905. They conscripted the islanders as laborers and mistreated them. After the German–Spanish Treaty of 1899, in which Germany acquired the Carolines, Palau, and the Marianas from Spain, Germany placed all of its Micronesian islands, including the Marshalls, under the governor of German New Guinea.

Question:
When did the Jaluit Gesellschaft's administration of the islands end?

1905