Revenue has grown steadily over the past 5 years; operating profit has fluctuated slightly and is still basically stable; net profit is stable except that it declined a lot in 2020 and recovered more quickly in 2021. Operating profit increased 2.8% in the first quarter of 2021, but both operating profit and net profit declined quite a bit. The main reason for the decline in net profit in the first quarter of 2021 was the rapid increase in costs.