Month	Millions Of Man-Hours
1926-01-01	11.1500
1926-02-01	10.2300
1926-03-01	11.2100
1926-04-01	11.2600
1926-05-01	12.2300
1926-06-01	12.4200
1926-07-01	13.8400
1926-08-01	13.6600
1926-09-01	12.5200
1926-10-01	12.2300
1926-11-01	11.3300
1926-12-01	11.3100
1927-01-01	10.9900
1927-02-01	10.3400
1927-03-01	11.3000
1927-04-01	11.4500
1927-05-01	11.7800
1927-06-01	12.2400
1927-07-01	13.6500
1927-08-01	13.6000
1927-09-01	12.2800
1927-10-01	12.2700
1927-11-01	11.2500
1927-12-01	11.3600
1928-01-01	10.8700
1928-02-01	10.5900
1928-03-01	11.4800
1928-04-01	11.1800
1928-05-01	12.1200
1928-06-01	12.5700
1928-07-01	13.3900
1928-08-01	13.8000
1928-09-01	12.6400
1928-10-01	12.1700
1928-11-01	11.4100
1928-12-01	12.1200
1929-01-01	11.3900
1929-02-01	10.4600
1929-03-01	11.7900
1929-04-01	11.4800
1929-05-01	12.2800
1929-06-01	12.9100
1929-07-01	14.0900
1929-08-01	14.5400
1929-09-01	12.8400
1929-10-01	12.6600
1929-11-01	12.1100
1929-12-01	11.9200
1930-01-01	11.3400
1930-02-01	10.6100
1930-03-01	11.9400
1930-04-01	11.7200
1930-05-01	12.4700
1930-06-01	12.1600
1930-07-01	13.1600
1930-08-01	13.4100
1930-09-01	11.8600
1930-10-01	11.6600
1930-11-01	11.0300
1930-12-01	11.1100
1931-01-01	10.7900
1931-02-01	9.93000
1931-03-01	10.6200
1931-04-01	10.5600
1931-05-01	11.1300
1931-06-01	11.0700
1931-07-01	12.0400
1931-08-01	11.8300
1931-09-01	10.5300
1931-10-01	10.4200
1931-11-01	9.47000
1931-12-01	9.56000
1932-01-01	9.20000
1932-02-01	8.80000
1932-03-01	9.25000
1932-04-01	9.16000
1932-05-01	9.29000
1932-06-01	9.09000
1932-07-01	9.50000
1932-08-01	9.15000
1932-09-01	8.55000
1932-10-01	8.87000
1932-11-01	8.37000
1932-12-01	8.69000
1933-01-01	8.10000
1933-02-01	7.32000
1933-03-01	7.81000
1933-04-01	7.75000
1933-05-01	8.19000
1933-06-01	8.48000
1933-07-01	9.44000
1933-08-01	9.58000
1933-09-01	9.18000
1933-10-01	9.13000
1933-11-01	8.55000
1933-12-01	8.81000
1934-01-01	8.48000
1934-02-01	7.90000
1934-03-01	9.06000
1934-04-01	8.81000
1934-05-01	9.34000
1934-06-01	9.68000
1934-07-01	10.2100
1934-08-01	10.3700
1934-09-01	9.61000
1934-10-01	9.46000
1934-11-01	8.82000
1934-12-01	9.25000
1935-01-01	8.95000
1935-02-01	8.30000
1935-03-01	9.43000
1935-04-01	9.14000
1935-05-01	9.58000
1935-06-01	9.76000
1935-07-01	10.3000
1935-08-01	10.5700
1935-09-01	9.66000
1935-10-01	9.89000
1935-11-01	9.55000
1935-12-01	9.76000
1936-01-01	9.53000
1936-02-01	8.98000
1936-03-01	9.68000
1936-04-01	9.76000
1936-05-01	10.3000
1936-06-01	10.4200
1936-07-01	11.2400
1936-08-01	11.5000
1936-09-01	10.6800
1936-10-01	11.1000
1936-11-01	10.5600
1936-12-01	11.2600
1937-01-01	10.8500
1937-02-01	9.88000
1937-03-01	11.1200
1937-04-01	10.8300
1937-05-01	11.4900
1937-06-01	11.4800
1937-07-01	12.3000
1937-08-01	12.0300
1937-09-01	11.2700
1937-10-01	11.4500
1937-11-01	10.4300
1937-12-01	10.4300
1938-01-01	9.89000
1938-02-01	9.12000
1938-03-01	9.87000
1938-04-01	9.67000
1938-05-01	9.72000
1938-06-01	9.84000
1938-07-01	10.7300
1938-08-01	10.8100
1938-09-01	10.0900
1938-10-01	10.4400
1938-11-01	9.90000
1938-12-01	10.5400
1939-01-01	10.0400
1939-02-01	10.1600
1939-03-01	10.4400
1939-04-01	10.1200
1939-05-01	10.4500
1939-06-01	10.6500
1939-07-01	11.5800
1939-08-01	11.5400
1939-09-01	11.0900
1939-10-01	11.1900
1939-11-01	10.6700
1939-12-01	11.0800
1940-01-01	10.6200
1940-02-01	10.1700
1940-03-01	10.8600
1940-04-01	10.4900
1940-05-01	10.9900
1940-06-01	11.2100
1940-07-01	11.9600
1940-08-01	12.4000
1940-09-01	11.3600
1940-10-01	11.6000
1940-11-01	11.1600
1940-12-01	11.6400
1941-01-01	11.5400
1941-02-01	10.4700
1941-03-01	11.9800
1941-04-01	11.5700
1941-05-01	12.5000
1941-06-01	12.4800
1941-07-01	13.5600
1941-08-01	13.8700
1941-09-01	12.8600
1941-10-01	13.0500
1941-11-01	12.6000
1941-12-01	12.8900
1942-01-01	12.7700
1942-02-01	12.2400
1942-03-01	14.3000
1942-04-01	14.9400
1942-05-01	16.4900
1942-06-01	18.4600
1942-07-01	20.8700
1942-08-01	18.2900
1942-09-01	15.7200