Here are the top 10 least popular jobs in the U.S.

First column is job, second is number of people in the U.S. who self-identify in that profession, third is hourly wage and fourth is annual wage.

Models	1,510	$13.14	$27,330
Astronomers	1,240	$50.35	$104,720
Geographers	1,170	$34.36	$71,470
Mathematical technicians	1,090	$19.83	$41,240
Segmental pavers	1,040	$13.33	$27,720
Farm labor contractors	1,000	$14.62	$30,400
Locomotive firers	960	$22.63	$47,060
Radio operators	870	$20.69	$43,040
Fabric menders, except garment	840	$13.50	$28,090
Prosthodontists	660	$53.42	$111,110

You can check out more lists and get a little more detail on the study here.