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:
Doctor_Who

Context:
The earliest Doctor Who-related audio release was a 21-minute narrated abridgement of the First Doctor television story The Chase released in 1966. Ten years later, the first original Doctor Who audio was released on LP record; Doctor Who and the Pescatons featuring the Fourth Doctor. The first commercially available audiobook was an abridged reading of the Fourth Doctor story State of Decay in 1981. In 1988, during a hiatus in the television show, Slipback, the first radio drama, was transmitted.

Question:
In what year was the first Doctor Who audiobook released?

1981