Rate 9 (does not know / not applicable / declines to answer) if the person does not know how to
answer the question, does not want to answer the question, or if the question does not apply to them.
Rate 1 (serious problem) if the person thinks that there is a serious problem for this question. A serious
problem is a problem which the person feels is serious (however they define this).
Rate 0 (no serious problem) if the person does not think that there is a serious problem for this question.