Concept: The question tests on basic Table Analysis (using percentage)
Solution:
The number of Matches Produced in Oregon in 1980 = 17% of 1.2 B
Let the state producing an equivalent number produce x%. The number produced = x * 1.6 B
Therefore x * 1.6 = 17 * 1.2
x = 17 * (12/16) = 51 / 4 = 12.75% or approximately 13%
The state is IOWA.
Option E