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.
National. The average annual salary for diagnostic medical sonographers was $65,800 as of May 2011, according to the Bureau of Labor Statistics. The top 10 percent of the occupation earned at least $90,640 per year, while the bottom 10 percent earned annual wages of $44,950.