Webpage values are missing while scraping data using BeautifulSoup python 3.6

I am using below script to scrap "STOCK QUOTE" data from http://fortune.com/fortune500/xcel-energy/, But its giving blank.

I have used selenium driver also, but same issue. Please help on this.

import requests
from bs4 import BeautifulSoup as bs
import pandas as pd

r = requests.get('http://fortune.com/fortune500/xcel-energy/')
soup = bs(r.content, 'lxml') # tried: 'html.parser

data = pd.DataFrame(columns=['C1','C2','C3','C4'], dtype='object', index=range(0,11))
for table in soup.find_all('div', {'class': 'stock-quote row'}):
    row_marker = 0
    for row in table.find_all('li'):
    column_marker = 0
    columns = row.find_all('span')
    for column in columns:
        data.iat[row_marker, column_marker] = column.get_text()
        column_marker += 1
    row_marker += 1
print(data)

Output getting:

              C1    C2   C3   C4
0       Previous Close:         NaN  NaN
1           Market Cap:   NaNB  NaN    B
2   Next Earnings Date:         NaN  NaN
3                 High:         NaN  NaN
4                  Low:         NaN  NaN
5         52 Week High:         NaN  NaN
6          52 Week Low:         NaN  NaN
7     52 Week Change %:   0.00  NaN  NaN
8            P/E Ratio:    n/a  NaN  NaN
9                  EPS:         NaN  NaN
10      Dividend Yield:    n/a  NaN  NaN