| 年份 | 分类 | 数值 |
| 2000 | United States : million dollars | 247,343.10 |
| 2001 | United States : million dollars | 249,410.50 |
| 2002 | United States : million dollars | 259,766.90 |
| 2003 | United States : million dollars | 270,119.20 |
| 2004 | United States : million dollars | 298,002.80 |
| 2005 | United States : million dollars | 326,506.00 |
| 2006 | United States : million dollars | 343,702.60 |
| 2007 | United States : million dollars | 363,583.10 |
| 2008 | United States : million dollars | 353,289.30 |
| 2009 | United States : million dollars | 368,918.10 |
| 2010 | United States : million dollars | 371,049.10 |
| 2011 | United States : million dollars | 363,687.50 |
| 2012 | United States : million dollars | 375,057.80 |
| 2013 | United States : million dollars | 393,096.40 |
| 2014 | United States : million dollars | 391,341.50 |
| 2015 | United States : million dollars | 381,434.60 |