9 instances from 4 years 2019 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep Oct 26 Nov Dec 2017 - 4 instances Jan Feb Mar Apr May Jun 22 Jul Aug Sep 14 2 Sep 14, 2017 2 instances 16:31:23 16:54:32 Oct 4 Nov Dec 2016 - 3 instances Jan Feb Mar Apr May Jun Jul Aug Sep 20 Oct 1 Nov Dec 29 2015 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 17