CREATE TABLE table_79966 ("Year of issue" FLOAT, "Theme" TEXT, "Composition" TEXT, "Issue price" TEXT, "Mintage" TEXT)

How many years was the issue price $19.95?
SELECT COUNT("Year of issue") FROM table_79966 WHERE "Issue price" = '$19.95'
SELECT COUNT("Year of issue") FROM "table_79966" WHERE "Issue price" = '$19.95'