Month	Millions Of Books
1935-01-01	13.7300
1935-02-01	13.9000
1935-03-01	14.7100
1935-04-01	13.5300
1935-05-01	14.0000
1935-06-01	14.4000
1935-07-01	14.9200
1935-08-01	14.6500
1935-09-01	14.6400
1935-10-01	17.5000
1935-11-01	15.7800
1935-12-01	15.5000
1936-01-01	14.9700
1936-02-01	13.0300
1936-03-01	15.7800
1936-04-01	15.0300
1936-05-01	15.5800
1936-06-01	17.4800
1936-07-01	18.3800
1936-08-01	16.6800
1936-09-01	16.9200
1936-10-01	18.5100
1936-11-01	16.1700
1936-12-01	19.1400
1937-01-01	16.9600
1937-02-01	16.0600
1937-03-01	19.7100
1937-04-01	19.0000
1937-05-01	15.8000
1937-06-01	16.6300
1937-07-01	16.5100
1937-08-01	16.7000
1937-09-01	16.0500
1937-10-01	16.7400
1937-11-01	15.6600
1937-12-01	14.7200
1938-01-01	14.4300
1938-02-01	13.7400
1938-03-01	14.9700
1938-04-01	14.2200
1938-05-01	16.2200
1938-06-01	16.2800
1938-07-01	14.5800
1938-08-01	17.0000
1938-09-01	15.5200
1938-10-01	16.2800
1938-11-01	16.2600
1938-12-01	14.7900
1939-01-01	16.1900
1939-02-01	16.2900
1939-03-01	16.8900
1939-04-01	16.0400
1939-05-01	16.5000
1939-06-01	16.4700
1939-07-01	16.5500
1939-08-01	17.4100
1939-09-01	18.9500
1939-10-01	20.2800
1939-11-01	19.3900
1939-12-01	15.6000
1940-01-01	18.3600
1940-02-01	15.9100
1940-03-01	17.4000
1940-04-01	17.3900
1940-05-01	18.5400
1940-06-01	18.0000
1940-07-01	18.2000
1940-08-01	18.7400
1940-09-01	16.9400
1940-10-01	18.5600
1940-11-01	17.4000
1940-12-01	17.4800
1941-01-01	19.9500
1941-02-01	18.3300
1941-03-01	19.6200
1941-04-01	21.3300
1941-05-01	24.4700
1941-06-01	26.1400
1941-07-01	26.2200
1941-08-01	26.5400
1941-09-01	27.8800
1941-10-01	28.2800
1941-11-01	24.8600
1941-12-01	23.3100
1942-01-01	24.9800
1942-02-01	22.8100
1942-03-01	22.8800
1942-04-01	19.6700
1942-05-01	18.1000
1942-06-01	20.0500
1942-07-01	16.4500
1942-08-01	17.2400