values not fetching from excel sheet in read_excel
#### Code Sample, a copy-pastable example if possible

```python
data = pd.read_excel('abcd.xlsx', sheet_name='Sheet 1')
print(data.head())

```
#### Problem description

Some of the columns showing NaN, even though it contains value in excel sheet.


#### Expected Output
       a           b            c        d
0    12       NaN        NaN    523.1
1    24       NaN        NaN    123.1 
2    24      NaN        NaN    213.1
3    45      NaN        NaN    231.1
4    67      NaN        NaN    222.1

#### Output of ``pd.show_versions()``
       a           b            c        d
0    12       12.24      2354   523.1
1    24       122.24      2364   523.1 
2    24       132.24      7354   523.1
3    45       112.24      6354   523.1
4    67       412.24      2854   523.1
<details>

[paste the output of ``pd.show_versions()`` here below this line]
INSTALLED VERSIONS
commit: None
python: 3.7.0.final.0
python-bits: 32
OS: Windows
OS-release: 7
machine: AMD64
processor: Intel64 Family 6 Model 78 Stepping 3, GenuineIntel
byteorder: little
LC_ALL: None
LANG: None
LOCALE: None.None

pandas: 0.24.1
pytest: None
pip: 9.0.1
setuptools: 39.1.0
Cython: None
numpy: 1.16.2
scipy: None
pyarrow: None
xarray: None
IPython: None
sphinx: None
patsy: None
dateutil: 2.8.0
pytz: 2018.5
blosc: None
bottleneck: None
tables: None
numexpr: None
feather: None
matplotlib: None
openpyxl: 2.5.4
xlrd: 1.1.0
xlwt: 1.3.0
xlsxwriter: 1.1.0
lxml.etree: None
bs4: 4.6.3
html5lib: None
sqlalchemy: None
pymysql: None
psycopg2: None
jinja2: 2.10
s3fs: None
fastparquet: None
pandas_gbq: None
pandas_datareader: None
gcsfs: None
None
</details>
