Where did you read about DC being 10% of the public grid and used for "higher power applications and converted at the power station transformer?"
The percentage is a bit of a misnomer HVDC is really really high power application, it connects the power grids of countries

So all 3 of them your country may have may very well cary 10% of the grid power in some circumstances . But that to depends .
HVDC is really useful for very long power lines and sea cables .
So any percentage given got to need some qualifications, during what time of the year and day ?