A data frame with the species names in the first column rows and the years (1980 - present) in
the remaining columns, the code represents the species' conservation status (see the IUCN RedList
website for details). If species do not have information (i.e. have not been evaluated), the result
is: NE (Not evaluated).
Codes and categories:
EX: Extinct
EW: Extinct in the Wild
VU: Vulnerable
EN: Endangered
CR: Critically Endangered
LC: Least Concern
NT: Near Threatened
DD: Data Deficient
CT: Commercially Threatened
IN: Indeterminate
IK: Insufficiently Known
LR: Lower Risk
RA: Rare