You can find a good guide to different Jungle booster pack variations in this previous thread:
www.elitefourum.com/t/1999-2000-jungle-booster-packs/14073/1
And the 1999-2000 Made in USD jungle booster packs probably came from this booster box variation:
www.elitefourum.com/t/english-unlimited-jungle-and-fossil-booster-box-variant/19927/1