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:
A BBC audience research survey conducted in 1972 found that, by their own definition of violence ("any act[s] which may cause physical and/or psychological injury, hurt or death to persons, animals or property, whether intentional or accidental") Doctor Who was the most violent of the drama programmes the corporation produced at the time. The same report found that 3% of the surveyed audience regarded the show as "very unsuitable" for family viewing. Responding to the findings of the survey in The Times newspaper, journalist Philip Howard maintained that, "to compare the violence of Dr Who, sired by a horse-laugh out of a nightmare, with the more realistic violence of other television series, where actors who look like human beings bleed paint that looks like blood, is like comparing Monopoly with the property market in London: both are fantasies, but one is meant to be taken seriously."

Question:
How many of the survey respondents considered Doctor Who very unsuitable for family viewing?

3%