Which heading should replace the question mark in the chart below?

year

?

1918

1.4

1919

1.4

1920

5.2

1921

11.7

unemployment rate in percent

immigration from asia in millions

immigration from europe in millions

women in the workforce in percent

on this day in 1833, president andrew jackson announces that the government will no longer use the second bank of the united states, the country's national bank. a national bank had first been created by george washington and alexander hamilton in 1791 to serve as a central repository for federal fund