mine was measured at 150 when i was 11 years old, and in a aptitude test they had in my last year of primary school (age 12) they had a 1-15 scale and i was 15 and my nearest competitor in a group of 30 was 11, which meant top 1%... the bell curve of IQ distribution puts 150 as the marker for the top 1%, those 175+ people are like 0.001% (one in 100k or so)