[{_id:"Team 1",count:1200},{_id:"Team 2",count:1170},{_id:"Team 3",count:1006},{_id:"Team 4",count:932},{_id:"Team 5",count:931},{_id:"Team 6",count:899},{_id:"Team 7",count:895}]

db.collection.aggregate([{$sort:{_id:-1}},{$group:{"_id":null,"categories":{"$push":"$_id"},"series":{"$push":"$count"}}},{$project:{_id:0,categories:1,series:[{counts:"$series"}]}}])