CREATE TABLE table_name_87 (year NUMBER, issue_price VARCHAR2, theme VARCHAR2)

What year had an issue price of $94.95 and theme of Amethyst crystal?
SELECT AVG(year) FROM table_name_87 WHERE issue_price = "$94.95" AND theme = "amethyst crystal"
SELECT AVG("year") FROM "table_name_87" WHERE "$94.95" = "issue_price" AND "amethyst crystal" = "theme"