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Your question is a bit difficult to understand. Perhaps you mean to ask: Question: What do you call someone who studies the statistics related to human populations? Answer: A demographer. http://en.wikipedia.org/wiki/Demographics
The census, in many places, counts the population every 10 years.
You call a boy who counts on his fingers prepared; he keeps his math tools handy.
A person who counts down is commonly referred to as a timer or a countdown operator.
Everyone Counts
The duration of Every Second Counts - US game show - is 1800.0 seconds.
Every Second Counts - US game show - ended in 1985-09.
The US Census happens once every ten years. The next one will happen in 2010.
Every Second Counts - US game show - was created on 1984-09-17.
Census are taken in the United Kingdom for population counts and tax purposes. The United Kingdom uses the census information to prepare for tax rates and population counts.
Enumeration is one possible answer. The census is another.
Call 911 - 2008 When Every Moment Counts 2-9 was released on: USA: 10 July 2009