How many more females per 100 than males with median age of 40 years old in the country?
return the  country ;return females of #1 ;return #2 with median age of 40 years ;return #3 per 100 males ;return number of  #4 ;return the  difference of #5 and  100
['select', 'project', 'filter', 'filter', 'aggregate', 'project']