You've got a point there. More data would be nice too.

My understanding of it, is that the data is used to check whether some groups don't receive too much unnecessary attention at the cost of not paying enough attention to other groups because of some non concious bias.

"On the other hand, in day-to-day police work, I'd think that statistics are everything"

Statistics are worth attention, but I really hope they're not everything in police work;)