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.
In its 2010 survey, the average yearly income of sonographers was $68,821 or $33.09 per hour. The ASRT provides a further breakdown by position, with staff sonographers earning $31.85 per hour, and supervisors averaging $38.29 per hour. Experience is also a factor. Sonographers with two years' experience or less averaged $26.89 per hour, while those with six to 10 years' experience earned $29.73 per hour.