CREATE TABLE table_19998 ("Year" TEXT, "Dates" TEXT, "Champion" TEXT, "Country" TEXT, "Score" TEXT, "Tournament location" TEXT, "Purse  ( $ ) " FLOAT, "Winners share  ( $ ) " FLOAT)

When are all years that the champion is Ji Min Jeong?
SELECT "Year" FROM table_19998 WHERE "Champion" = 'Ji Min Jeong'
SELECT "Year" FROM "table_19998" WHERE "Champion" = 'Ji Min Jeong'