The bottom three MIA FOs are June of 17 hires. Currently the bottom 767 Captain is January 16 hire and the bottom 747 Captain is a November 14 hire. That being said there are about 60 FOs who have passed on upgrade on the 747 and about 135 who have passed on the 767. There was a company email referenced in another thread that said there were eight 747 upgrades last year and about 100 767 upgrades. The eight on the 747 didn't even start to keep up with attrition. If you were to be hired now there are 774 FOs below the junior 767 Captain. Those numbers are based on the 31 December 2018 list.