The line graph shows the number of graduates from the classes of 2001 through 2007 at a certain school who enrolled in college within 24 months of graduation.
Based on the information provided in the graph, which of the following statements is NOT necessarily true?
The number of graduates who enrolled in college increased from 2003 to 2005.
The number of graduates who enrolled in college was always above 200.
The number of graduates who enrolled in college decreased in exactly two periods shown.
The total number of graduates from the school increased each year from 2001 to 2007.
