Spending on personal travel including leisure, education and health-related travel as well as passenger air transportation increased 3.1 percent and 3.4 percent, respectively. Education-related travel, in and of itself, accounted for nearly two-thirds (65 percent) of the increase in personal travel.
The number of international travelers to the United States rose 0.7 percent in 2017 compared to the previous year.  Growing markets were led by South Korea (+17.8 percent), Brazil (+11 percent), Argentina (+10 percent), Ireland (+9 percent), and Canada (+4.8 percent).  Growing markets outnumbered declining markets by 2-to-1.
On April 9, 2018, NTTO temporarily suspended publication of overseas arrivals data due to anomalies in records received from U.S. Customs and Border Protection (CBP). Together, the NTTO and CBP identified approximately 4.5 million records that had been misclassified with respect to residency, due to a programing error. The misclassification had not been identified until it became apparent that the records were not reflecting trends consistent with other indicators of overseas travel to the United States.
The data has been revised for 2016 and 2017 and has been posted to the NTTO website:  https://travel.trade.gov/