SELECT period FROM table_171748_3 WHERE _percentage_trains_arriving_within_5_mins_of_scheduled_time_moving_annual_average__maa_ = "89.6%"
Kapan persentase kereta tiba dalam waktu 5 menit dari waktu yang dijadwalkan 89,6%?
CREATE TABLE table_171748_3 (period VARCHAR, _percentage_trains_arriving_within_5_mins_of_scheduled_time_moving_annual_average__maa_ VARCHAR)