get the bottom half of the column in Python

import numpy as np
import pandas as pd
import seaborn as sns
import matplotlib.pyplot as plt


df = pd.read_csv('C:/Users/eli/Desktop/application_record.csv')
plt.figure(figsize=(12,5))
bottom_half_income = df.nsmallest(n=int(0.5*len(df)),columns='AMT_INCOME_TOTAL')

box_plot = sns.boxplot(x ='NAME_FAMILY_STATUS', y = 'AMT_INCOME_TOTAL', data = bottom_half_income, hue ='FLAG_OWN_REALTY', linewidth=3)
plt.legend(bbox_to_anchor=(1.05, 1), loc=2, borderaxespad=0.,title='FLAG_OWN_REALTY')
plt.title('Income Totals per Family Status for Bottom Half of Earners')