CREATE TABLE table_204_10 (id NUMBER, "ecclesiastical jurisdictions" CLOB, "latin name" CLOB, "type" CLOB, "rite" CLOB, "ecclesiastical province" CLOB, "established" CLOB, "area  ( km2 ) " NUMBER)

how many dioceses were established before 1978 ?
SELECT COUNT("ecclesiastical jurisdictions") FROM table_204_10 WHERE "established" < 1978
SELECT COUNT("ecclesiastical jurisdictions") FROM "table_204_10" WHERE "established" < 1978