United States of America – Annual [840.A]
- min:
- 0
- max:
- 20
- avg:
- 6.148
- σ:
- 5.489
| Period | Value |
|---|
| 1994 | 0 |
| 1995 | 3 |
| 1996 | 2 |
| 1997 | 0 |
| 1998 | 1 |
| 1999 | 6 |
| 2000 | 6 |
| 2001 | 6 |
| 2002 | 9 |
| 2003 | 2 |
| 2004 | 3 |
| 2005 | 0 |
| 2006 | 2 |
| 2007 | 0 |
| 2008 | 7 |
| 2009 | 6 |
| 2010 | 10 |
| 2011 | 3 |
| 2012 | 2 |
| 2013 | 4 |
| 2014 | 7 |
| 2015 | 9 |
| 2016 | 16 |
| 2017 | 11 |
| 2018 | 18 |
| 2019 | 20 |
| 2020 | 13 |