Pie chart not getting all values

My data frame has 26 values but when I try to make a pie chart it only gets 11 values. What’s wrong?

My code:

import plotly.express as px
import pandas as pd

df = pd.read_excel(r"D:\Intensivo Python Hashtag\aula 2\export\estados.xlsx")

df = df.drop([“PIB”, “Área”, “Capital”], axis=‘columns’)

fig = px.pie(data_frame=df, values=‘População’, names=‘Nome’, title=“População Brasileira por Estado”, template=‘presentation’, )
fig.show()

print(df.info())

my data:

my chart: