Re-build README.Rmd and Graphs

README.md

@@ -17,7 +17,7 @@ The archive may be viewed here:
 
 <https://massmail.illinois.edu/massmailArchive>
 
-Data has **768** observations and **7** variables:
+Data has **767** observations and **7** variables:
 
 - `datetime`: Date and time when the email was sent in the form of
   `YYYY-MM-DD HMS` with either CDT or CST.