| http://id.insee.fr/qualite/attribut/1916/I.18.12/text |
http://www.w3.org/1999/02/22-rdf-syntax-ns#value |
<p>The survey is conducted every month but not all questions are asked every month.</p>
<p>In practice, three models of questionnaires were created to take into account these specificities :<br />
- the first questionnaire corresponds to the months of January and July.<br />
- the second one is sent in February, April, June, August, October and December.<br />
- the last one is sent in March, May, September and November.</p> |
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