import matplotlib.pyplot as plt
data = [100, 120, 95, 110, 105, 130, 115, 125, 135, 140, 120, 110, 105, 115, 130, 125, 110, 115, 120, 135]
plt.boxplot(data, patch_artist = True, showmeans = True)
plt.title('Number of New Customers Registered in Last 20 Months')
plt.show() 
