Agreed, but that's true of all stats.  Always a good idea to take a look at the notes to be sure of what you're reading.  Also why, in this case, it's a good idea to look at harmonized unemployment metrics across countries.  The BLS produces them (I think) either annually or quarterly.  The IMF produces them as well.

Most stats agencies are collecting the same stuff though.  It's just a question of whether they have the resources to collect the data (and the independence to do it properly).  Comparing stats from North America and Western Europe is usually a pretty easy task.

Be nice to America. Or we'll bring democracy to your country.