Not that you asked *me*, but my guess is that it was meant to be "per year"... if less all the better. Doesn't seem like much to get into a snit over though since (a) its not specifically about the PBLS lease property and (b) we'll find out when its corrected.
Either way it does seem to say that there *is* oil in them thar hills (or plains as the case may be)... somewhere. ;)