private int getMediumHistoricResult(){
        Iterator<Roll> it = historical.iterator();
        int total=0;
        while(it.hasNext()){
            Collection results = it.next().getRollResult();
            Iterator<Integer> it2 = results.iterator();
            int subtotal=0;
            while(it2.hasNext()){
                subtotal += it2.next();
            }
            total+=subtotal/results.size();
        }
        return total/Historical.getInstance().size();
    }