CREATE TABLE table_203_424 (id NUMBER, "year" NUMBER, "starts" NUMBER, "wins" NUMBER, "top 5" NUMBER, "top 10" NUMBER, "poles" NUMBER, "avg. start" NUMBER, "avg. finish" NUMBER, "winnings" CLOB, "position" CLOB, "team ( s ) " CLOB)

for how many year was grissom ranked a in a top 10 position in the nationwide series ?
SELECT COUNT("year") FROM table_203_424 WHERE "top 10" > 0
SELECT COUNT("year") FROM "table_203_424" WHERE "top 10" > 0