docs: def get_inflators_cn_to_cn(target_year):
      '''
          Calcule l'inflateur de vieillissement à partir des masses de comptabilité nationale.
      '''
      data_year = find_nearest_inferior(data_years, target_year)
      data_year_cn_aggregates = get_cn_aggregates(data_year)['consoCN_COICOP_{}'.format(data_year)].to_dict()
      target_year_cn_aggregates = get_cn_aggregates(target_year)['consoCN_COICOP_{}'.format(target_year)].to_dict()
  
      return dict(
          (key, target_year_cn_aggregates[key] / data_year_cn_aggregates[key])
          for key in data_year_cn_aggregates.keys()
          )