World main economic blocks balance sheets (attempt)

Here is something I would like to complete...
It is an attempt to model the world's main economic blocks balance sheets.

By economic blocks, I mean:
- US/EU/JP/China/etc households
- US/EU/JP/China/etc corporations
- US/EU/JP/China/etc governments

The objective is to have the big picture on:
- who are the biggest economic actors? and how they compare?
- who is overleveraged? and potential consequences?
etc.


Here is my first draft.
I welcome any input, as I find it hard to get and verify some of the information.