I cannot display that 0 < x < 1 % in charts_flutter or pie_chart

Hello, I’m Japanese application engineer. First of all, I’m sorry that I am not good at English.

final List<SubscriberSeries>[ ]data = [
      SubscriberSeries(
          year: "data-1",
          subscribers: 34.0,
          barColor: charts.ColorUtil.fromDartColor(Color(0xff3BD694))),
      SubscriberSeries(
          year: "data-2",
          subscribers: 0.2,
          barColor: charts.ColorUtil.fromDartColor(Color(0xffFACE6B))),
      SubscriberSeries(
          year: "data-3",
          subscribers: 65.8,
          barColor: charts.ColorUtil.fromDartColor(Color(0xffF46D8C))),
    ];

Anyway, I want to know how to display 0 < x < 1 in charts_flutter and pie_charts. For example, I can always display that 65.8% and 34.0% but 0.2% cannot be done in my code. Please tell me about this problem. How do I fix that.