The Sixth Economic Census is being done in 2011. What was the year of the first Economic Census?

The Sixth Economic Census is being done in 2011. What was the year of

1.	The Sixth Economic Census is being done in 2011. What was the year of the first Economic Census?
A.	1951
B.	1961
C.	1977
D.	1971
Answer» D. 1971