2009-03: 35 GB
2009-02: 29 GB
2009-01: 32 GB
2008-12: 29 GB
2008-11: 30 GB
2008-10: 27 GB
2008-09: 43 GB
2008-08: 38 GB
2008-07: 26 GB
2008-06: 27 GB
2008-05: 28 GB
2008-04: 55 GB
2008-03: 20 GB
2008-02: 51 GB
2008-01: 40 GB
2007-12: 53 GB