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.
The Bureau of Labor Statistics reported an average income of $65,800 per year for sonographers, as of May 2011. The lowest-earning 25 percent reported incomes of up to $58,830 per year, while the highest-earning 25 percent earned $76,060 a year or more.raduates from an accredited sonography program can write a certification exam through the American Registry of Radiologic Technologists or the American Registry of Diagnostic Medical Sonographers, both of which test the candidate's theoretical and practical understanding of ultrasound technology.