The trick is that the odd workers that you can't fit into a corporation is less of a percentage of your workforce as your workforce gets larger. Mostly simplified into it is easier as you have more population.
Hit over 97% in a couple 30 million population countries before. Had to log on at least once a day to redistribute the work force & tweak Education priorities. Found it tedious lol. It's a whole lot easier to be happy with 95%.
Achea Roman Empire Province 97.67 Ceredigion Roman Empire Provin 97.47 Dalmatia Roman Empire Province 97.43 Atlantis Roman Empire Province 97.29 Roman Empire 97.03