CREATE TABLE table_name_42 (mintage INT, year VARCHAR, theme VARCHAR)

What is the MIntage after 2006 of the Ruby-Throated Hummingbird Theme coin?
SELECT MAX(mintage) FROM table_name_42 WHERE year > 2006 AND theme = "ruby-throated hummingbird"
SELECT MAX("mintage") FROM "table_name_42" WHERE "ruby-throated hummingbird" = "theme" AND "year" > 2006