(_id,country,region,city,doctype,name)

_id,doctype,and name

db.collection.mapReduce(
    function(){emit(this.name);},
    function(key,values){
        sum=0;
        for(var i=0;i<values.length;i++){
           sum+=values[i];
        }
        return sum;
    },
    {out:"count_per_name"}
);