| 4.13 | ? pages? duration | |
| 2011 | 3.86 | 365 pages? duration |
| 2008 | 4.03 | 304 pages? duration |
| 2006 | 3.97 | 291 pages? duration |
| 2013 | 3 | 304 pages? duration |
| 2004 | 3.64 | 250 pages? duration |
| 2000 | 3.3 | 561 pages? duration |
| 1952 | 0 | 290 pages? duration |
| 1988 | 4.3 | 303 pages? duration |
| 2003 | 3.5 | 318 pages? duration |
| 2008 | 3.72 | 229 pages? duration |
| 2010 | 3.92 | 246 pages? duration |
| 1974 | 3.85 | 417 pages? duration |
| 2011 | 3 | 228 pages? duration |
| 2013 | 0 | 385 pages? duration |