10 instances from 3 years 2019 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep 18 Oct Nov Dec 2018 - 7 instances Jan Feb Mar Apr May Jun 21 3 Jun 21, 2018 3 instances 20:31:46 20:45:30 20:46:53 22 3 Jun 22, 2018 3 instances 04:48:10 11:20:44 11:32:53 23 Jul Aug Sep Oct Nov Dec 2017 - 2 instances Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 25 26