responce

{
    "_id" : ObjectId("57a48c731b252bcce6cab8ad"),
    "doc_info" : "info4",
    "wa_count" : 2,
    "ax_count" : 2
}

{
    "_id" : ObjectId("57a48c691b252bcce6cab8ac"),
    "doc_info" : "info3",
    "wa_count" : 3,
    "ax_count" : 3
}

{
    "_id" : ObjectId("57a48c611b252bcce6cab8ab"),
    "doc_info" : "info_2",
    "wa_count" : 2,
    "ax_count" : 2
}

{
    "_id" : ObjectId("57a48c571b252bcce6cab8aa"),
    "doc_info" : "info_1",
    "wa_count" : 0,
    "ax_count" : 0
}