margin 1,000 800 700 600 500 400 300 200 100 0 % 18% 15% 12% 9% 6% 3% 0% 539 489 486 497 747 14.0% 12.6% 12.3% 11.9% 16.6% % 20 15 10 5 0 15.6% 21.7% 19.5% 16.9% 16.5% 2012 2013 2014 2015 2016 25 7,000 3,000 4,000 5,000 6,000 1,000 2,000 2012 2013 2014 2015 2016 3,435 3,953 4,539 5,500 5,331 0 12,000 4,000 6,000 8,000 10,000 0 2,000 2012 2013 2014 2015 2016 9,949 9,343 9,144 9,546 9,986 10 structure and the railway network reduce the possibility of increased use of these forms of transportation.