That is a very good question. In fact, one of the problems is that chief justices want to know exactly how many requests there are. But quantitative analysis has to consider so many factors that, statistically, the data have little validity. Actually, you can make those figures say anything you like.
That is why the Commissioner of Official Languages went to a qualitative analysis, rather than a quantitative one. He conducted interviews with people like myself, people working in the trenches, that is, to determine the nature of the obstacles, not to try and quantify the consequences of those obstacles.