I'd also be curious, why the cutoff at 2012. Do the results change if they go to 2020? 2024? Whenever I see a cutoff like that it makes me suspicious that that

I'd also be curious, why the cutoff at 2012. Do the results change if they go to 2020? 2024? Whenever I see a cutoff like that it makes me suspicious that that date was chosen because another date would not product the results they wanted.