| Year | Issues |
| 2018 | Vol 20, No 4 Vol 20, No 3 Vol 20, No 2 Vol 20, No 1 |
| 2017 | Vol 19, No 4 Vol 19, No 3 Vol 19, No 2 Vol 19, No 1 |
| 2016 | No 4 No 3 No 2 No 1 |
| 2015 | No 4 No 3 No 2 No 1 |
| 2014 | No 4 No 3 No 2 No 1 |
| 2013 | No 4 No 3 No 2 No 1 |
| 2012 | No 4 No 3 No 2 No 1 |
| 2011 | No 4 No 3 No 2 No 1 |
| 2010 | No 4 No 3 No 2 No 1 |
| 2009 | No 4 No 3 No 2 No 1 |
| 2008 | No 4 No 2 |
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