public DataTable GetStatistics()
        {
            MySqlCommand mySqlCommand = new MySqlCommand();
            mySqlCommand.Connection = db.mySqlConnections;

            mySqlCommand.CommandText =
            "SELECT count(Id_) " +
            "INTO @j " +
            "FROM FinancialTransaction_ " +
            "WHERE KeyToRecipient_ " +
            "IN(60); " +
            "SET @i := 0; " +
            "SELECT " +
            "AVG(Sum_) " +
            "FROM " +
            "( " +
            "SELECT " +
            "@i:= @i + 1, " +
            "FLOOR(@i / (@j / (6 - 1))) AS `group_id`, " +
            "Sum_, " +
            "Date_ " +
            "FROM " +
            "FinancialTransaction_ " +
            "WHERE KeyToRecipient_ IN(60) " +
            "ORDER BY " +
            "Date_ ASC " +
            ") AS tab1 " +
            "GROUP BY " +
            "group_id;";

            MySqlDataReader result = mySqlCommand.ExecuteReader();
            var dt = new DataTable();
            dt.Load(result);
            return dt;
        }