A script that generates a list of names that used to be popular in among US births and has fallen in popularity.
unzip names.zip
bundle
update .select { |row| row[1] == 'F' }
to be F
or M
update if year <= 1935
to be the last year you're looking for old peak popularity
update if year > 1965
to be the first year you're looking for new peak popularity
bundle exec ruby countercyclicalnames.rb