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_99 (year INTEGER, detroit__dtw_ VARCHAR)
### Question:
For how many years did Detroit have a passenger fare of $307.29?
### Answer:
SELECT SUM(year) FROM table_name_99 WHERE detroit__dtw_ = "$307.29"