SCHEMA:
CREATE TABLE table_18852984_2 (bills_originally_cosponsored VARCHAR, all_amendments_cosponsored VARCHAR)
USER:
How many bills where originally cosponsored in those years where the total of all amendments cosponsored was 0?

QUERY:
SELECT bills_originally_cosponsored FROM table_18852984_2 WHERE all_amendments_cosponsored = 0