year | # of sources | % |
---|---|---|
2007 | 295 | 24.16 |
2013 | 592 | 48.48 |
2014 | 76 | 6.22 |
2015 | 144 | 11.79 |
2016 | 62 | 5.08 |
month | # of sources | % |
---|---|---|
2007-08 | 128 | 10.48 |
2007-09 | 128 | 10.48 |
2013-03 | 530 | 43.41 |
2013-04 | 26 | 2.13 |
2015-03 | 48 | 3.93 |
2015-12 | 30 | 2.46 |