2017
| January (1 article) | May | September |
| February (3 articles) | June | October |
| March (4 articles) | July | November |
| April | August | December |
2016
| January (1 article) | May (1 article) | September (2 articles) |
| February (3 articles) | June | October (5 articles) |
| March (4 articles) | July (1 article) | November (7 articles) |
| April | August | December (3 articles) |
2015
| January | May (2 articles) | September |
| February | June | October (4 articles) |
| March (4 articles) | July | November (2 articles) |
| April (4 articles) | August | December (1 article) |
2014
2013
| January | May (2 articles) | September (2 articles) |
| February (4 articles) | June | October (2 articles) |
| March (7 articles) | July (3 articles) | November (1 article) |
| April (3 articles) | August | December (5 articles) |
2012
| January (4 articles) | May (2 articles) | September (5 articles) |
| February (2 articles) | June (1 article) | October (1 article) |
| March (4 articles) | July | November (4 articles) |
| April (2 articles) | August | December |
2011
2010
| January | May (2 articles) | September (2 articles) |
| February (1 article) | June (3 articles) | October |
| March (5 articles) | July (2 articles) | November (4 articles) |
| April (3 articles) | August | December (3 articles) |
2009
2008
2007
2006
2005
2004
2003
| January (2 articles) | May (2 articles) | September (13 articles) |
| February | June | October (6 articles) |
| March | July (3 articles) | November (6 articles) |
| April (1 article) | August (4 articles) | December (4 articles) |
2002
| January | May | September (2 articles) |
| February | June | October |
| March | July (1 article) | November |
| April | August | December |