Who cares? The "raw numbers" population of Ontario has increased by 3 million since 1997. It's proportions and per capita rates that matter. To analyze the changes in a subset of the population, you have to analyze the changes in the set as a whole. This is high school level statistical analysis.
We've seen dramatic increases in tuition, and the representation of minority students in law school got worse. To be incredibly clear, the percentage of minority students increased, but at a much lower rate than the population - the general population increased more than 50% faster than the law school population. Given the respective growth rates, if the ratio of minority law students to minority people in Ontario was 1:10000 in 1996, it would be nearly 1:11000 in 2004.
And we still can't conclude the effects of tuition deregulation on this rate of change because there's no counterfactual. And the data is 14 years old!
You're just factually wrong, and the survey you so confidently claimed would clearly show you were right completely contradicts you.