Question: What was the mintage having an issue price of $1,099.99, artist being Pamela Stagg?
SQL: SELECT AVG("Mintage") FROM "2-11916083-72" WHERE "Issue Price" = '$1,099.99' AND "Artist" = 'Pamela Stagg';

Question: What was the year that had an issue price of $1,295.95?
SQL: SELECT AVG("Year") FROM "2-11916083-72" WHERE "Issue Price" = '$1,295.95';

Question: What is the composition with an artist of Henry Purdy, a year smaller than 2002, and a mint more than 1998?
SQL: SELECT "Composition" FROM "2-11916083-72" WHERE "Year" < 2002.0 AND "Mintage" > 1998.0 AND "Artist" = 'Henry Purdy';

Question: What was the average mintage for that of artist Celia Godkin, before the year 2010?
SQL: SELECT AVG("Mintage") FROM "2-11916083-72" WHERE "Artist" = 'Celia Godkin' AND "Year" < 2010.0;