| 时间 | 值 （百万吨公里） | 世界排名 |
|---|---|---|
| 2016 | 53313307 | 20 |
| 2015 | 46966763 | 20 |
| 2014 | 39570522 | 20 |
| 2013 | 35986501.8 | 20 |
| 2012 | 32909408.7 | 20 |
| 2011 | 29538937 | 23 |
| 2010 | 31269061 | 20 |
| 2009 | 15728171 | 25 |
| 2008 | 18825976 | 23 |
| 2007 | 20952513 | 22 |
| 2006 | 21243010 | 19 |
| 2005 | 21857658 | 18 |
| 2004 | 21167881 | 18 |
| 2003 | 20661206 | 16 |
| 2002 | 19618662 | 16 |
| 2001 | 20172824 | 14 |
| 2000 | 20894205 | 14 |
| 1999 | 20561100 | 13 |
| 1998 | 17717400 | 14 |
| 1997 | 17266500 | 15 |
| 1996 | 14677700 | 17 |
| 1995 | 14968800 | 17 |
| 1994 | 18791400 | 12 |
| 1993 | 16484800 | 14 |
| 1992 | 15532200 | 14 |
| 1991 | 14901000 | 14 |
| 1990 | 14341300 | 13 |
| 1989 | 12689000 | 13 |
| 1988 | 11412300 | 13 |
| 1987 | 13504900 | 11 |
| 1986 | 13824500 | 10 |