| Year | Number of Regular Discharges in Millions, Unweighted |
Total Number of Discharges in Millions, Unweighted |
|---|---|---|
| 2003 | 7,977,728 | (no value) |
| 2002 | 7,853,982 | (no value) |
| 2001 | 7,452,727 | (no value) |
| 2000 | 7,450,992 | (no value) |
| 1999 | 7,198,929 | (no value) |
| 1998 | 6,827,350 | (no value) |
| 1997 | 7,148,420 | (no value) |
| 1996 | 6,542,069 | (no value) |
| 1995 | 6,714,935 | (no value) |
| 1994 | 6,385,011 | (no value) |
| 1993 | 6,538,976 | (no value) |
| 1992 | 6,008,001 | 6,195,744 |
| 1991 | 5,984,270 | 6,156,188 |
| 1990 | 6,156,638 | 6,268,515 |
| 1989 | 6,067,667 | 6,110,064 |
| 1988 | 5,242,904 | 5,265,756 |