Python：在留資格別外国人数を国籍別に棒グラフ化する

import warnings
warnings.filterwarnings('ignore')

import tabula

df = tabula.read_pdf("http://www.moj.go.jp/content/001289225.pdf",
             output_format='dataframe',
             pages = '4',
             encoding='utf-8',
             java_options=None,
             pandas_options=None,
             multiple_tables=False)

df1=df.drop(['中長期在留者','Unnamed: 7'], axis=1)
df1=df1.rename(columns={'日本人の国籍・地域 計':'総数','技術・ 人文知識・':'技術・人文知識・国際業務','Unnamed: 10':'日本人の配偶者等'})
df1.head(2)

import numpy as np

df2 = df1[np.arange(len(df)) % 2 != 0]
df2

for i, col in enumerate(df2.columns):
    df2.iloc[:, i] = df2.iloc[:, i].str.replace(',','').str.replace(' ','')

import re

b=[]
for i in df2['総数']:
    a = re.split('(\d+)', i)
    b.append(a)

m=[]
n=[]
for i,j,k in b:
    m.append(i)
    n.append(j)
df2['総数']=n
df2['国名']=m

cols = df2.columns.tolist()
cols = cols[-1:] + cols[:-1]
df2 = df2[cols]

import pandas as pd

df2 = df2.set_index(['国名'])
df2 = df2.apply(pd.to_numeric, errors="coerce").astype(int)

from matplotlib.pyplot import *
from matplotlib.font_manager import FontProperties
from matplotlib import rcParams
style.use('fivethirtyeight')

fp = FontProperties(fname='/usr/share/fonts/opentype/ipaexfont-gothic/ipaexg.ttf', size=54)
rcParams['font.family'] = fp.get_name()
rcParams["font.size"] = "25"
fig, ax = subplots(figsize=(25,12))
rc('xtick', labelsize=35)
rc('ytick', labelsize=35)
df2.iloc[2:3:,1:11].T.sort_values(by='韓国',ascending=False).plot(ax=ax,kind='barh')
xticks(np.arange(0,3.1e5,1e5/6),
   ['{}万'.format(int(x/1e4)) if x > 0 else 0 for x in np.arange(0,3.1e5,1e5/6)])
ax.legend(loc='best', fancybox=True, framealpha=0.5, fontsize=40)
for i in ax.patches:
    ax.text(i.get_width()+1.5e3,i.get_y()+.45,\
      '{:,}人'.format(int(round((i.get_width()), 2))), fontsize=35, color='k')
ax.invert_yaxis();

c = cm.tab20(np.linspace(0.1, 0.9, 11))
fig, ax = subplots(figsize=(20,14))
rc('xtick', labelsize=20)
rc('ytick', labelsize=25)
df2.iloc[1:12:,1:11].T.sort_values(by='韓国',ascending=False).plot(ax=ax,kind='barh',\
 color=c,stacked=True)
xticks(np.arange(0,8.1e5,1e5/2),
   ['{}万'.format(int(x/1e4)) if x > 0 else 0 for x in np.arange(0,8.1e5,1e5/2)])
ax.legend(loc='best', fancybox=True, framealpha=0.5, fontsize=40)