It's a bit of an art in some ways, simply because the Constitution gives responsibility for the administration of justice to the provinces, so how the provinces have sorted out their procedures and how they use their judicial resources varies a little across the country. Relevant information would be trends in filing cases in various areas, such as family or civil or criminal, or we would look at patterns of case flows.
Again, because each province and territory has such different demographics and different geographic and social conditions, it's not possible to give a response of, “This is what you must achieve in order to be allocated a new judicial resource.” That's simply not the way the Constitution has set up the administration of justice in Canada.