Counting people by age

# Counting people by age.
child = 0
early = 0
prime = 0
mature = 0
elderly = 0
tries = 0
print("Counting people by age.")
print("Child = 0-14     early = 15-24     prime = 25-54     mature = 55-65     elderly = 66 and over")
print("Enter age for 10 people.")

keep_running = False
while (keep_running == False) and (tries < 10):
    tries = tries + 1
    age = int(input ("Enter age in years, person " + str(tries) + " > "))
    if age > 0 and age <= 14:
        child = child + 1
    elif age > 14 and age <= 24:
        early = early +1
    elif age > 24 and age <= 54:
        prime = prime + 1
    elif age > 54 and age <= 65:
        mature = mature + 1
    elif age > 65:
        elderly = elderly + 1
    else:
        print("I do not understand. Please run again")


else:
    print("child = " + str(child) + "   early = " + str(early) + "   prime = " + str(prime) + "   mature = " + str(mature) + "   eldery = " + str(elderly))