CREATE TABLE table_202_196 (id DECIMAL, "ethnicity" TEXT, "1880" TEXT, "1899" TEXT, "1913" TEXT, "19301" TEXT, "1956" TEXT, "1966" TEXT, "1977" TEXT, "1992" TEXT, "2002" TEXT)

which ethnicity has the biggest population in 1992 ?
SELECT "ethnicity" FROM table_202_196 ORDER BY "1992" DESC LIMIT 1
SELECT "ethnicity" FROM "table_202_196" ORDER BY "1992" DESC NULLS LAST LIMIT 1