json.count @count

json.ec_years do
  json.array! @ec_years do |ec_year|
    json.extract! ec_year, :id, :year

    json.student_count @student_count_map.fetch(ec_year.id, 0)
    json.training_subitem_count @training_subitem_count_map.fetch(ec_year.id, 0)
    json.graduation_requirement_count @graduation_requirement_count_map.fetch(ec_year.id, 0)
    json.course_count @course_count_map.fetch(ec_year.id, 0)
    json.course_target_count @course_target_count_map.fetch(ec_year.id, 0)
    json.graduation_subitem_count @graduation_subitem_count_map.fetch(ec_year.id, 0)
  end
end