 The literacy test and head tax that came with this act were ineffective, preventing just 1,500 immigrants annually, from entering the country between 1918 and 1921.Following these results, a quota system designed to prevent immigration, based on nationality was enacted (The Emergency Quota Act of 1921), which meant that 3% of the amount of a particular nationality in a 1910 census, were to be permitted entry.Nativists were not satisfied by the results, culminating in the Johnson-Reed Act of 1924, which would limit Europeans to 150,000 a year, zero Japanese immigrants, and 2% of every other nationality's population in the 1890 census.