Annual U.S. HPS Cases and Case-fatality, 1993-2011
| Year | Case Count | Case Fatality |
|---|---|---|
| 1993 | 48 | 56.25% |
| 1994 | 32 | 37.50% |
| 1995 | 24 | 41.67% |
| 1996 | 22 | 31.82% |
| 1997 | 23 | 21.74% |
| 1998 | 33 | 27.27% |
| 1999 | 43 | 32.56% |
| 2000 | 46 | 23.91% |
| 2001 | 11 | 27.27% |
| 2002 | 23 | 43.48% |
| 2003 | 31 | 29.03% |
| 2004 | 27 | 18.52% |
| 2005 | 34 | 29.41% |
| 2006 | 41 | 41.46% |
| 2007 | 29 | 41.38% |
| 2008 | 24 | 50.00% |
| 2009 | 20 | 25.00% |
| 2010 | 21 | 29.00% |
| 2011 | 24 | 50.00% |
| Total | 587 | 36.39% |
