Yes indeed, because what you have here are statistics covering several years. As the years pass, we will be less and less able to make this type of comparison because we will not have as many details as in the past. I think that is important. These studies show trends, but we will no longer be able to compare these trends because we will not have the same type of information. That is why I am asking the question.
On May 7th, 2013. See this statement in context.