average annual income in 1923, average annual income in 1920, average annual income in 1929, average annual income in 1930, average annual income in 1934, average annual income in 1935, average annual income in 1939, average annual income in 1943
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average annual income in 1923
average annual income in 1920
average annual income in 1929
average annual income in 1930
average annual income in 1934
average annual income in 1935
average annual income in 1939
average annual income in 1943
average annual income in 1923, average annual income in 1920, average annual income in 1929, average annual income in 1930, average annual income in 1934, average annual income in 1935, average annual income in 1939, average annual income in 1943
