| Year | Size (bytes) | Modification time |
|---|---|---|
| 1978-1982 | 0 | Fri Aug 31 15:41:13 2012 |
| 1983-1989 | 0 | Thu May 19 10:40:27 2011 |
| 1990-1994 | 0 | Thu May 19 10:40:13 2011 |
| 1995-1999 | 0 | Thu May 19 10:40:01 2011 |
| 2000-2004 | 0 | Fri Aug 31 15:35:24 2012 |
| 2005-2009 | 0 | Thu May 19 10:39:21 2011 |
| 2010-2014 | 0 | Fri Jun 7 11:45:24 2013 |