如何在动画情节上书写价值？

Question

我有一个数据框

 import pandas as pd
 import seaborn as sns
 import matplotlib
 import matplotlib.pyplot as plt
 import matplotlib.animation as animation
 import matplotlib.ticker as ticker
 import matplotlib.ticker as mtick
 d = {'Perc_Seats': [  0,17,23,31,35,35,27,23,52,56.]}
 idx= [1984, 1989, 1991, 1996, 1998, 1999, 2004, 2009, 2014, 2019]
 df = pd.DataFrame(data=d,index=idx)

我试图为此编写动画图，我的脚本在下面

  fig,ax1 = plt.subplots(figsize=(8,6))

  ax1.set_position([0.2,0.05,0.75,0.9])
  plt.xlim(1984, 2019)

  plt.ylim(0,100)
  plt.xlabel('Year',fontsize=20)
  plt.ylabel("percent",fontsize=20)

  plt.tick_params(labelsize=15)

  plt.xticks(np.arange(1984, 2020, step=5))


  fmt = '%.0f%%' # Format you want the ticks, e.g. '40%'
  yticks = mtick.FormatStrFormatter(fmt)
  ax1.yaxis.set_major_formatter(yticks)

  plt.yticks(np.arange(0, 101, step=20))

  ln1,=plt.plot([],[],"-*r")
  def animate(frame):
       for a in range (len(df)):
            data1 = df.iloc[:frame+1] 
            ln1.set_data(data1.index,data1.values)

  ani = matplotlib.animation.FuncAnimation(fig, animate, frames=10, repeat=True)
 plt.show() 

我想在绘制年份时进行计算，我想分别在点（*）上写出每年的百分比值