16 instances from 3 years 2018 - 11 instances Jan Feb Mar Apr May 18 19 24 26 Jun 23 25 Jul 5 6 2 Jul 6, 2018 2 instances 01:55:07 19:34:16 7 2 Jul 7, 2018 2 instances 09:04:03 18:57:32 Aug Sep Oct Nov Dec 2017 - 4 instances Jan 18 19 Feb 6 Mar Apr May Jun 22 Jul Aug Sep Oct Nov Dec 2016 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov 22 Dec