Adding total line to graph with multi item X axis

Hi,

I am currently trying to find a solution for a graph that I was requested to create. The user would like a graph that shows the items on the x axis broken down by year, and then by our different companies, which is easy enough to do. The issue is they also want a line on the graph that shows the total for each year (or basically all items for all companies rolled into one total). It seems to not be possible to do this since adding a second x axis item removes the line options in formatting. 

Here is a picture of what I was requested to create:

Here is what I have been able to create in powerBI, issue is, as soon as I add a second item to the X axis I am not able to add a trend or reference line, the option dissapears. 

The X axis needs to be split by a count, as well as year, while still retaining the option to add a line that I can code to show the total for each year.

Is there a work around for the line option disappearing with two x axis items?