MySql - Count by Month with 2 differents dates in the table : I'm working on a project in order to count the number of incidents opened and closed per months. 
I've a sql DB and which the records are. I'm trying to write a SQL request to count the number of incidents Opened and Closed each month. 

Here is an exemple of the table I've:

[enter image description here][1]


And the result I want. 
[enter image description here][2]


  [1]: https://i.stack.imgur.com/IRsvG.png
  [2]: https://i.stack.imgur.com/444H9.png

Thanks in advance for your support :)

Regards,
Eric.