The informat 4.1 tells SAS to read in the number for murders, then write it so that it
has 4 characters (including the decimal point), with one digit after the decimal place. Thus, 89
becomes 8.9 and 114 becomes 11.4. If you wanted the rates with denominators of 1,000 people, so
that 89/1,000,000 appeared in the data as .089, you would use the informat 4.3 instead. Finally,
percent5. tells SAS to strip the percent signs from METRO. After reading the data with the informats
in the program above, SAS interprets the data as follows: