| 时间 | 值 （百万吨公里） | 世界排名 |
|---|---|---|
| 2016 | 53817352.7 | 19 |
| 2015 | 50345821 | 19 |
| 2014 | 49673884 | 18 |
| 2013 | 47995842 | 18 |
| 2012 | 39165195.2 | 18 |
| 2011 | 38218608.9 | 18 |
| 2010 | 34239014.2 | 18 |
| 2009 | 23766316 | 21 |
| 2008 | 22420870 | 20 |
| 2007 | 21325754 | 20 |
| 2006 | 17833364 | 23 |
| 2005 | 20369086 | 19 |
| 2004 | 19226564 | 20 |
| 2003 | 16704600 | 18 |
| 2002 | 16281275 | 20 |
| 2001 | 16107156 | 21 |
| 2000 | 16560793 | 20 |
| 1999 | 14984600 | 21 |
| 1998 | 13654400 | 20 |
| 1997 | 15591600 | 17 |
| 1996 | 15117600 | 16 |
| 1995 | 15417800 | 16 |
| 1994 | 14249800 | 15 |
| 1993 | 13101300 | 15 |
| 1992 | 12756900 | 15 |
| 1991 | 11837400 | 15 |
| 1990 | 10241500 | 17 |
| 1989 | 8694600 | 19 |
| 1988 | 7683600 | 21 |
| 1987 | 7396100 | 20 |
| 1986 | 6310500 | 22 |