CREATE TABLE table_204_143 (id NUMBER, "national park" CLOB, "region" CLOB, "land area  ( km2 ) " NUMBER, "established" NUMBER, "visitation  ( 2009 ) " NUMBER, "coordinates" CLOB)

how many national parks were established after 1990 ?
SELECT COUNT("national park") FROM table_204_143 WHERE "established" > 1990
SELECT COUNT("national park") FROM "table_204_143" WHERE "established" > 1990