Different organizations have different procedures for collecting, analyzing, and interpreting statistics. I'm not sure of the techniques the US government uses, but I've always used their statistics because they tend to be broader and you can generally get the raw data to verify their information. Plus, they're considered accurate and reliable by researchers. If you have to two different organizations that are reporting relatively the same results, it's safe to say that the results are pretty valid. If not, I'd ask how the data is collected.
GLS/SS d- s-:- a- C+++ P+ L+++ W+++ w-- PS+++ PE t R+++ tv+ b+ D++ e+++ h+ r---
The admin-mod team lacks standards.
"[...]driving down the highway screaming 'Ploterait of the world, unite!'."