Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_84 (total_viewers VARCHAR, share VARCHAR, bbc_one_weekly_ranking VARCHAR)
### Question:
What is the total number of total viewers with a share of 18.8% and a weekly ranking under 16?
### Answer:
SELECT COUNT(total_viewers) FROM table_name_84 WHERE share = "18.8%" AND bbc_one_weekly_ranking < 16