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(Thousands)
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2006 | 73 | 69 | 77 | 69 | 76 | 76 | 61 | 73 | 66 | 71 | 68 | 57 |
| 2007 | 66 | 60 | 68 | 65 | 73 | 67 | 59 | 66 | 61 | 69 | 65 | 52 |
| 2008 | 64 | 62 | 61 | 66 | 65 | 68 | 61 | 61 | 64 | 63 | 52 | 45 |
SOURCE: U.S. Department of Transportation, Bureau of Transportation Statistics, based on data from U.S. Department of Homeland Security, Customs and Border Protection, Operations Management Database, 2006-2008.