Provide a list of all numbers mentioned in the provided text and what they represent
40 million: The number of years ago when the ancestors of llamas are thought to have originated from the Great Plains of North America
three million: The number of years ago the ancestors of llamas are thought to have migrated to South America during the Great American Interchange
10,000–12,000: The number of years ago camelids were extinct in North America
2007: As of this year, there were over seven million llamas and alpacas in South America and over 158,000 llamas and 100,000 alpacas, descended from progenitors imported late in the 20th century, in the United States and Canada
seven million: The number of llamas and alpacas in South America as of 2007
158,000: The number of llamas in the United States and Canada, that descended from progenitors imported late in the 20th century, as of 2007
100,000: The number of alpacas in the United States and Canada, that descended from progenitors imported late in the 20th century, as of 2007
20: The century where progenitors were imported to United States and Canada