When you have a DataFrame with one column to be used as X axis
and other as a source of lines to draw, you should:
- set the index to the "X" column (in your case Month),
- run plot,
- terminate the command with a semicolon, to block a text message
concerning the picture object.
The code to do it is:
DomReg1418.set_index('Month').plot();
For the test, I entered X and 3 Count columns, for first 6 months
and executed the above command, getting the following result:
