<Ul> <Li> Free Trade Area of the Americas (FTAA) (no interest since 2005) </Li> <Li> Southern African Customs Union (on hold since 2006) </Li> <Li> Thailand (on hold after 2006 coup) </Li> <Li> Qatar (on hold since 2006) </Li> </Ul> <Li> Free Trade Area of the Americas (FTAA) (no interest since 2005) </Li> <Li> Southern African Customs Union (on hold since 2006) </Li> <Li> Thailand (on hold after 2006 coup) </Li>

Which of the following is true of u.s. net exports prior to the 1960s