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.
Hourly Pay Rate and Salary. According to the Bureau of Labor Statistics, medical sonographers earned an average wage of $31.90 an hour in 2012. Half of all medical sonographers reported wages ranging from $26.09 to $36.97 an hour. The average salary of a diagnostic medical sonographer was $66,360 a year, and half of medical sonographers reported annual incomes of between $54,260 and $76,890.