Four Standard Deviations Above the Average (IQ = 182)
Approximately 99.997% of our population has an IQ of 181 or below. Only 0.003% or about 1 in 30,000 possesses an IQ of 182 or above. (There would be about 9,000 such individuals in the United States, or about 10,000 in the United States and Canada.)

[link to hiqnews.megafoundation.org]