题目选项分析

In the country of Marut, the Foreign Trade Agency's records were reviewed in 1994 in light of information then newly available about neighboring Goro. The review revealed that in every year since 1963, the agency's projection of what Goro's gross national product(GNP) would be five years later was a serious underestimate. The review also revealed that in every year since 1963, the agency estimated Goro's GNP for the previous year--a Goro state secret--very accurately.

Of the following claims, which is most strongly supported by the statement given?

【选项】The amount by which the agency underestimated the GNP it projected for Goro tended to increase over time.