This does not take into account the increased number of ppl. As an extreme example to illustrate my point if it has been 2 million ppl living in Germany in 2001 and 10 million in 2002 in the age range they are looking at then it’s actually better. It should be based on % rather than just numbers. Also it doesn’t look at the trend. If it the trend was to increase by 30% but dropped afterwards to 20% then again it has worked in some way.

I’m not arguing that this is definitely the case, I’m just saying how data should be looked at and compared to have a better understanding of the outcome of an event. But if I’m wrong I’d love to hear why. :)