International Journal of Shape Modeling was created in 1994.
A contour map.
A contour map.
A contour map.
A contour map.
Your Shape was created in 2009.
There is no exact number to answer this question, however, there are more than likely tens of thousands of people in the U.S. that are involved in modeling in some shape or form, especially if you factor in the number of freelance models that work without the assistance of a modeling agency.
3 d modeling
Classix Shape was created in 1999.
The Shape of Grace was created in 1992.
Shape ApS was created in 2004.
Shape - magazine - was created in 1981.
The Shape Shifter was created in 2006.