| Year | Total | Affirmative | Defensive |
|---|---|---|---|
| 1990 | 8,472 | 5,672 | 2,800 |
| 1991 | 5,035 | 2,908 | 2,127 |
| 1992 | 6,307 | 4,123 | 2,184 |
| 1993 | 9,543 | 7,509 | 2,034 |
| 1994 | 13,828 | 11,775 | 2,053 |
| 1995 | 20,703 | 17,573 | 3,130 |
| 1996 | 23,532 | 18,624 | 4,908 |
| 1997 | 22,939 | 16,380 | 6,559 |
| 1998 | 20,507 | 13,216 | 7,291 |
| 1999 | 26,571 | 18,150 | 8,421 |
| 2000 | 32,514 | 23,278 | 9,236 |
| 2001 | 39,148 | 29,147 | 10,001 |
| 2002 | 36,937 | 25,960 | 10,977 |
| 2003 | 28,743 | 15,367 | 13,376 |
| 2004 | 27,376 | 14,354 | 13,022 |
| 2005 | 25,304 | 13,547 | 11,757 |
| 2006 | 26,352 | 13,048 | 13,304 |
| 2007 | 25,318 | 12,459 | 12,859 |
| 2008 | 23,022 | 12,130 | 10,892 |
| 2009 | 22,303 | 12,003 | 10,300 |
| 2010 | 19,777 | 11,258 | 8,519 |
| 2011 | 23,631 | 13,493 | 10,138 |
| 2012 | 27,446 | 16,871 | 10,575 |
| 2013 | 24,631 | 14,886 | 9,745 |
| 2014 | 23,038 | 14,424 | 8,614 |
| 2015 | 25,946 | 17,807 | 8,139 |
| 2016 | 20,311 | 11,616 | 8,695 |
| 2017 | 26,382 | 15,817 | 10,565 |
| 2018 | 37,702 | 24,504 | 13,198 |
| 2019 | 45,805 | 26,893 | 18,912 |
| 2020 | 30,736 | 16,132 | 14,604 |
| 2021 | 16,628 | 9,212 | 7,416 |
| 2022 | 36,615 | 14,134 | 22,481 |
Footnotes
Source: Office of Homeland Security Statistics.
