እንደ ሀገር የወጪ ምንዛሬ ተመን ማሻሻያ ከተደረገበት ጊዜ ጀምሮ እነዚህ ምርቶች ከፍተኛ የዋጋ ጭማሪ አሳይተዋል።
These ecosystem services have become all the more important nationally given the reduction in wetland habitats that has occurred since European settlement.