CREATE TABLE table_name_39 (year NUMBER, mintage VARCHAR2, issue_price VARCHAR2)

What is the latest year that has an n/a mintage and an Issue Price of $89.95?
SELECT MAX(year) FROM table_name_39 WHERE mintage = "n/a" AND issue_price = "$89.95"
SELECT MAX("year") FROM "table_name_39" WHERE "$89.95" = "issue_price" AND "mintage" = "n/a"