| 时间 | 值 （百万吨公里） | 世界排名 |
|---|---|---|
| 2016 | 1318350.1 | 87 |
| 2015 | 897078.6 | 103 |
| 2014 | 579715.7 | 111 |
| 2013 | 1800847.5 | 76 |
| 2012 | 147500 | 140 |
| 2011 | 160243.8 | 138 |
| 2010 | 300970 | 123 |
| 2009 | 1706055 | 68 |
| 2008 | 1823157 | 65 |
| 2007 | 1850921 | 64 |
| 2006 | 1843140 | 63 |
| 2005 | 1653638 | 65 |
| 2004 | 1612479 | 70 |
| 2003 | 1411910 | 72 |
| 2002 | 1407423 | 67 |
| 2001 | 1407423 | 67 |
| 2000 | 1283780 | 72 |
| 1999 | 1050400 | 76 |
| 1998 | 521000 | 98 |
| 1997 | 523000 | 97 |
| 1996 | 523000 | 97 |
| 1995 | 747800 | 84 |
| 1994 | 747800 | 81 |
| 1993 | 747800 | 82 |