This is a collection of most of the EAS alerts from 1997 to 2010 that I found.

Years:

0:00 1997
3:00 1998
9:03 1999
14:52 2000
20:21 2001
28:08 2002
36:06 2003
46:24 2004
57:29 2005
1:03:54 2006
1:16:06 2007
1:32:21 2008
1:47:26 2009
2:00:23 2010