GRE General Test: RC-245190 GRE Reading Comprehension

Around 1850 there were about 800 farms in Otsego County. By the 1950's the number of farms had dropped to around 400. By 1988 there were only 81 farms in operation. Therefore, the amount of land in the county that is devoted to farming has dropped by about 90 percent in the past 140 years.
A major flaw in the argument above is that it