Simplify the following text for a Grade 6 native English-speaking person.
Original: After resigning from his Asimov 's position , he remained the editor of the anthology series The Year 's Best Science Fiction , published annually since 1984 .
Simplified: After leaving Asimov 's , he continued as the editor of the series The Year 's Best Science Fiction . This has been published each year since 1984 .