Yeah, strenght of subtype. It's on a scale of 1 to 3, 3 being the strongest but also fairly rare.
That you got 3Fe yet mostly introverted types as other possible types is interesting.
It makes you both very introverted and very Fe, it's conflictory in a way, even more so since you have have types from three different quadras.
You're results are odd if I dare say, how you place yourself regarding them becomes rather interesting.
But maybe you don't care and that's fine too.