CREATE TABLE table_name_60 (year INT, number_in_entourage VARCHAR, mission_type VARCHAR)

What is the latest year of a gratitude type mission with 99 in the entourage?
SELECT MAX(year) FROM table_name_60 WHERE number_in_entourage = "99" AND mission_type = "gratitude"
SELECT MAX("year") FROM "table_name_60" WHERE "99" = "number_in_entourage" AND "gratitude" = "mission_type"