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.
On average, a sonographer who works first or second shift at 40 hours per average a week makes $25 to $30 per hour. Those who are on call or work third shift can make up to $40 to $60 per hour on average. Most hospitals pay the cardiac sonographers per hour regardless if they see patients.