This function can be used in two different ways. Without an argument, it returns a reference
table that includes information about all the CIA World Factbook tables that are available
through this function. Note the Name
column that indicates a unique name for each
available dataset. If this name is passed as an argument to the function, the function
will return the corresponding dataset.
CIAdata(name = NULL)
An optional parameter specifying the name of the desired dataset. If multiple names are given, a merge will be attempted on the individual data sets.