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_16799784_9 (year_named VARCHAR, longitude VARCHAR)
### Question:
How many years have a longitude measure of 20.0e?
### Answer:
SELECT COUNT(year_named) FROM table_16799784_9 WHERE longitude = "20.0E"