The graph compares the prices of the imports and export of the United States between year 1987 in December to year 2009 in November. The source is Bloomberg/Horowitz & Company and the measure is in million dollars. Overall, the prices of imports are always higher than the exports. The highest imports costs nearly 210,000 million dollars which is double of the highest exports cost. And for the the lowest prices, It‘s around 70,000 million dollars for the imports and approximately 50,000 for the exports. Both imports and exports have similar tendency. At first, It slightly grow to the peak at the beginning in 2008 and then dropped rapidly at the end in the same year.