`medium

import pandas as pd
import matplotlib.pyplot as plt

auto = pd.read_csv('/datasets/auto.csv')
auto['total'] = auto['october'] + auto['november'] + auto['december']
total_segments = auto['total'].sum() + 53148 + 44067
premium = 53148 / total_segments
bus = 44067 / total_segments
medium = auto['total'].sum() / total_segments

data = pd.Series({'Премиум': premium, 'Грузовики и др.': bus, 'Медиум':medium})
data.plot(kind='bar')