Quote from Lucrum:
http://anepigone.blogspot.com/2011/01/average-iq-by-occupation.html
Average IQ by occupation (estimated from wordsum scores)
32. Commercial airline pilot
105.6
33. Dental hygienist
105.5
95. Construction worker
90.0
96. Roofer
89.3
98. Carpenter
87.4
Very enlightening big zero, you should start one of these about once a week or so.