Description of node <>

Subject Predicate Object <p>The survey is conducted every month but not all questions are asked every month. Some questions are only asked to enterprises in road haulage of goods.</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, March, April, May, June, August, Septembre, November and December;<br /> - the last one is sent in April and October.</p>