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:
Economy_of_Greece

Context:
Greece has the largest merchant navy in the world, accounting for more than 15% of the world's total deadweight tonnage (dwt) according to the United Nations Conference on Trade and Development. The Greek merchant navy's total dwt of nearly 245 million is comparable only to Japan's, which is ranked second with almost 224 million. Additionally, Greece represents 39.52% of all of the European Union's dwt. However, today's fleet roster is smaller than an all-time high of 5,000 ships in the late 1970s.

Question:
How many ships did Greece's navy have in the late 1970s?

5,000