The International Air Transport Association (IATA) released data for global air freight markets showing that demand rose 4.1% in April 2018, compared to the same period the year before. This was up from the 1.8% growth in annual demand recorded in March 2018. Freight capacity grew by 5.1% year-on-year in April 2018. This was the second time in 21 months that capacity growth outstripped demand growth. After a sharp fall in March 2018, to a 23-month low, global air freight volumes recovered slightly in April 2018. The pace at which demand is growing, however, remains significantly slower than in much of 2017.
Collected and summarized from the source below by Quynh Hoa http://www.iata.org/pressroom/pr/Pages/2018-05-30-01.aspx