# Display the number of prizes won by male and female recipients.
# ... YOUR CODE FOR TASK 2 ...
gender = nobel.groupby('sex').year.count()
print(gender)



# Display the number of prizes won by the top 10 nationalities.
# ... YOUR CODE FOR TASK 2 ...
countries = nobel.groupby('birth_country').year.count()
top10 = countries.sort_values(ascending=False)
print(top10[:10])