Table schema:
CREATE TABLE table_name_32 (total_passengers__millions__2011_12 INTEGER, annual_entry_exit__millions__2011_12 VARCHAR)

Question: What's the lowest number of total passengers (millions) for an annual entry/exit of 36.609?
SQL: SELECT MIN(total_passengers__millions__2011_12) FROM table_name_32 WHERE annual_entry_exit__millions__2011_12 = 36.609