Yea you gotta start with some way of getting an insight. I plan on travelling AU/NZ hopefully next year. And I will try to take careful note of that the "vacation impression" is nothing compared to actually living there. It's just a start and tip of the iceberg.
I seem to remember a much higher number than that in the US...well, that was before Ben turned the chopper blades on and flicked the printing press switches to high...now it might be more meth.
I wouldn't doubt it at all....uncle ben's pixie dust will really get those consumers spending! I saw another article that said something like 99% of british 5 pound notes were contaminated too.
The number of US bills I remember was something like that. This was a few years ago mind you, now there is probably dirty investment banker sweat on everything.