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.
Most sonographers enter the field through an accredited two-year educational program at a college, community college or training hospital. These provide a grounding in the basic sciences, as well as course work focusing on human anatomy and physiology, and the interpretation of ultrasound images. 2010 salary survey by the American Society of Radiologic Technologists returned similar numbers, showing an average salary of $68,821 per year. The BLS projects a 44 percent increase in demand for sonographers between 2010 and 2020, much higher than the average for all occupations.