Table joins leaving data out

I have 2 tables with years, months, location and area number, amongst other data.  I am doing a "merge queries" and having Table A on the left and Table B on the right.  I've tried doing left joins, right, and full outer - the issue is that that Table B has some area numbers that are not in Table A. When I do the join, I want all area numbers from both tables per location. In my case, when I join, the final table does not include the other area numbers from Table B. 

Below is an example of what my data would be like:

Table A

Table B

Comparing these 2 example tables, LA in table B has area 88. After my join, the final table only lists LA-41 and LA-52, I can't get it to bring in LA-88. 

#"Merged Queries" = Table.NestedJoin(#"Previous Transformation", 
                   {"Year", "Month", "Location", "Area"}, TableA, 
                   {"Year", "Month", "Location", "Area"}, "TableB", 
                   JoinKind.LeftOuter)

Which join should I do instead or what am I doing wrong?