(VOVworld) - The tourism sector recorded its highest-ever one year revenue increase of 15% to 10.9 billion USD despite many difficulties in 2014, thanks to efforts to expand key markets and stimulate domestic demand. According to statistics revealed at a press conference on selecting the top 10 culture, sports and tourism events of the year held in Hanoi on Thursday, Vietnam welcomed 37.5 million domestic tourists this year, up 7.14%, and 8 million foreign tourists, up 5.64%.