"year","commodity","tonnages","percentage"
"2008","Coal","184.92","0.315"
"2009","Coal","161.74","0.309"
"2010","Coal","175.65","0.311"
"2011","Coal","177.6","0.319"
"2012","Coal","173.11","0.304"
"2013","Coal","162.24","0.286"
"2014","Coal","154.91","0.26"
"2015","Coal","126.03","0.224"
"2016","Coal","109.76","0.201"
"2017","Coal","104.47","0.195"
"2008","Petroleum","148.94","0.254"
"2009","Petroleum","145.33","0.278"
"2010","Petroleum","145.35","0.257"
"2011","Petroleum","138.76","0.249"
"2012","Petroleum","149.55","0.263"
"2013","Petroleum","159.81","0.282"
"2014","Petroleum","165.17","0.277"
"2015","Petroleum","162.28","0.288"
"2016","Petroleum","157.16","0.288"
"2017","Petroleum","152.19","0.284"
"2008","Chemicals","45.49","0.077"
"2009","Chemicals","42.36","0.081"
"2010","Chemicals","49.03","0.087"
"2011","Chemicals","50.74","0.091"
"2012","Chemicals","50.5","0.089"
"2013","Chemicals","49.85","0.088"
"2014","Chemicals","51.59","0.086"
"2015","Chemicals","50.75","0.09"
"2016","Chemicals","52.17","0.096"
"2017","Chemicals","53.58","0.1"
"2008","Crude Materials","105.71","0.18"
"2009","Crude Materials","75.14","0.144"
"2010","Crude Materials","87.62","0.155"
"2011","Crude Materials","87.08","0.156"
"2012","Crude Materials","88.33","0.155"
"2013","Crude Materials","90.42","0.16"
"2014","Crude Materials","96.46","0.162"
"2015","Crude Materials","98.35","0.175"
"2016","Crude Materials","94.61","0.173"
"2017","Crude Materials","96.93","0.181"
"2008","Manufactured Goods","25.08","0.043"
"2009","Manufactured Goods","15.03","0.029"
"2010","Manufactured Goods","20.63","0.037"
"2011","Manufactured Goods","23.15","0.042"
"2012","Manufactured Goods","26.24","0.046"
"2013","Manufactured Goods","26.4","0.047"
"2014","Manufactured Goods","31.19","0.052"
"2015","Manufactured Goods","28.44","0.05"
"2016","Manufactured Goods","26.73","0.049"
"2017","Manufactured Goods","30.51","0.057"
"2008","Food and Farm","67.69","0.115"
"2009","Food and Farm","75.32","0.144"
"2010","Food and Farm","79.38","0.14"
"2011","Food and Farm","72.41","0.13"
"2012","Food and Farm","74.1","0.13"
"2013","Food and Farm","70.85","0.125"
"2014","Food and Farm","89.98","0.151"
"2015","Food and Farm","89.66","0.159"
"2016","Food and Farm","97.16","0.178"
"2017","Food and Farm","94.86","0.177"
"2008","Manufactured Equipment","8.46","0.014"
"2009","Manufactured Equipment","7.38","0.014"
"2010","Manufactured Equipment","6.51","0.012"
"2011","Manufactured Equipment","6.11","0.011"
"2012","Manufactured Equipment","6.43","0.011"
"2013","Manufactured Equipment","5.93","0.01"
"2014","Manufactured Equipment","6.21","0.01"
"2015","Manufactured Equipment","6.8","0.012"
"2016","Manufactured Equipment","6.8","0.012"
"2017","Manufactured Equipment","2.32","0.004"