What the hell, is this test meant to flatter us?  My type says 1% also.  By my count that makes 4 of the 16 personality types that each comprise only 1% of the population.   
  
I talked to friends about this a long time ago, one a psychologist and the other an anthropologist.  They both were of the opinion that these tests could be used as tools to determine a personality type like intended, but there's nothing that suggests that ONLY these personality types exist.  The reason it seems hokey (like astrology) is because it kinda works.  But I had this conversation a long time ago and can't remember the details.  
  
Incidentally both times I took the test (then and today), I got the same personality type INFP - "Healer".  The description fits me fairly well, I think.