That stopped when the priests realized that most of the people couldn't actually use a quipu in that manner: the converts had to return to the quipu specialists to obtain a quipu and a list of sins that corresponded to the knots. After that, the Spanish worked to suppress the use of the quipu.
Average sonographer salary. An average hourly rate (wage) and the annual salary for sonographers in the United States is around $31.90 per hour and $66,360 per year.
How Much Does an Ultrasound Tech Make? Diagnostic medical sonographers earn a median income of $67,530 annually or $32.47 hourly according to the May 2014 Occupational Employment Statistics provided by the Bureau of Labor Statistics. Median is the mark where half earn less and half earn more.