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_71 (candidates VARCHAR, seats_won VARCHAR, _percentage_of_vote VARCHAR, election VARCHAR)
### Question:
How many candidates had 0 percent of the vote in 1999?
### Answer:
SELECT COUNT(candidates) FROM table_name_71 WHERE _percentage_of_vote = 0 AND election = 1999 AND seats_won > 0