9 instances from 4 years 2019 - 2 instances Jan Feb Mar Apr May Jun Jul 20 Aug Sep Oct 26 Nov Dec 2017 - 1 instance Jan Feb Mar Apr May Jun Jul Aug 29 Sep Oct Nov Dec 2016 - 4 instances Jan Feb Mar Apr May Jun 20 3 Jun 20, 2016 3 instances 14:09:37 17:44:42 22:42:36 21 Jul Aug Sep Oct Nov Dec 2015 - 2 instances Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 16 2 Dec 16, 2015 2 instances 12:04:36 20:06:37