text: 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_2181798_1 (year VARCHAR, avg_finish VARCHAR)
  ### Question:
  Name the number of years for 18.5
  ### Answer:
  SELECT COUNT(year) FROM table_2181798_1 WHERE avg_finish = "18.5"