| Fiscal Year | Appropriation Amount (in millions) | FTE Utilized |
| 1979 | $65 | 1,746 |
| 1980 | $66 | 1,719 |
| 1981 | $71 | 1,667 |
| 1982 | $69 | 1,491 |
| 1983 | $67 | 1,310 |
| 1984 | $64 | 1,238 |
| 1985 | $66 | 1,201 |
| 1986 | $63 | 1,107 |
| 1987 | $65 | 1,007 |
| 1988 | $66 | 986 |
| 1989 | $66 | 894 |
| 1990 | $77 | 903 |
| 1991 | $76 | 926 |
| 1992 | $83 | 939 |
| 1993 | $87 | 953 |
| 1994 | $92 | 933 |
| 1995 | $99 | 944 |
| 1996 | $99 | 939 |
| 1997 | $102 | 928 |
| 1998 | $107 | 965 |
| 1999 | $117 | 964 |
| 2000 | $125 | 985 |
| 2001 | $147 | 1,007 |
| 2002 | $156 | 1,054 |
| 2003 | $177 | 1,051* |
| 2004 | $186 | 1,057* |
| 2005 | $205 | 1,019* |
| 2006 | $211 | 1,007* |
| 2007 | $211 | 1,061* |
| 2008 | $244 | 1,094* |
| 2009 | $259 | 1,107* |
| 2010 | $292 | 1,136* |
| 2011 | $291 | 1,160* |
| 2012 | $312 | 1,132* |
| 2013 | $296 | 1,144* |
| 2014 | $298 | 1,145* |
| 2015 | $293 | 1,144* |
| 2016 | $307 | 1,165* |
| 2017 | $313 | 1,134* |
| 2018 | $306 | 1,102* |
| 2019 | $310 | 1,101* |
| 2020 | $331 | 1,128* |
| 2021 | $351 | 1,123* |
| 2022 | $376.5 | 1,119* |
| 2023 | $430 | 1,217* |
| 2024 | $425.7 | 1,292* |
*Includes reimbursable FTE