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
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