Monthly Millions Of Man-Hours
1921-07-01 14.8400
1921-08-01 14.0700
1921-09-01 14.8700
1921-10-01 16.3100
1921-11-01 14.5100
1921-12-01 12.7200
1922-01-01 13.9300
1922-02-01 13.3800
1922-03-01 13.2600
1922-04-01 12.0500
1922-05-01 13.2900
1922-06-01 13.6900
1922-07-01 23.1100
1922-08-01 35.1100
1922-09-01 41.9700
1922-10-01 40.0600
1922-11-01 34.5400
1922-12-01 33.5700
1923-01-01 31.3800
1923-02-01 29.2200
1923-03-01 28.2100
1923-04-01 26.0200
1923-05-01 28.3900
1923-06-01 27.6000
1923-07-01 29.1300
1923-08-01 27.8100
1923-09-01 27.9700
1923-10-01 27.1800
1923-11-01 22.7900
1923-12-01 18.9200
1924-01-01 20.2400
1924-02-01 20.8200
1924-03-01 18.3900
1924-04-01 15.8300
1924-05-01 16.6100
1924-06-01 15.7800
1924-07-01 16.2800
1924-08-01 16.9300
1924-09-01 18.2500
1924-10-01 18.4900
1924-11-01 17.8600
1924-12-01 18.0800
1925-01-01 20.0800
1925-02-01 16.7200
1925-03-01 14.9900
1925-04-01 13.8200
1925-05-01 16.1500
1925-06-01 15.4700
1925-07-01 17.1700
1925-08-01 17.7900
1925-09-01 18.6900
1925-10-01 20.0600
1925-11-01 19.8500
1925-12-01 18.0900
1926-01-01 18.4200
1926-02-01 19.1100
1926-03-01 16.9100
1926-04-01 15.6400
1926-05-01 17.8800
1926-06-01 17.1100
1926-07-01 19.0300
1926-08-01 19.6300
1926-09-01 21.7900
1926-10-01 22.1700
1926-11-01 20.3800
1926-12-01 19.6000
1927-01-01 18.7100
1927-02-01 16.3600
1927-03-01 14.9100
1927-04-01 15.4600
1927-05-01 18.0400
1927-06-01 16.3300
1927-07-01 17.6000
1927-08-01 17.0700
1927-09-01 17.8800
1927-10-01 17.5500
1927-11-01 15.3100
1927-12-01 14.7600
1928-01-01 14.7000
1928-02-01 12.6000
1928-03-01 12.5300
1928-04-01 12.5000
1928-05-01 14.0900
1928-06-01 13.7800
1928-07-01 15.6800
1928-08-01 15.7200
1928-09-01 16.9600
1928-10-01 16.6200
1928-11-01 14.5100
1928-12-01 13.5200
1929-01-01 14.8500
1929-02-01 14.5300
1929-03-01 13.9600
1929-04-01 12.9300
1929-05-01 15.2200
1929-06-01 15.3700
1929-07-01 16.6900
1929-08-01 16.5600
1929-09-01 17.3900
1929-10-01 16.9300
1929-11-01 13.7100
1929-12-01 14.8600
1930-01-01 13.6500
1930-02-01 10.7600
1930-03-01 10.7400
1930-04-01 10.0100
1930-05-01 11.4400
1930-06-01 10.2900
1930-07-01 10.4000
1930-08-01 10.2900
1930-09-01 10.0500
1930-10-01 9.59000
1930-11-01 8.81000
1930-12-01 7.78000
1931-01-01 7.53000
1931-02-01 6.89000
1931-03-01 7.69000
1931-04-01 6.61000
1931-05-01 7.48000
1931-06-01 6.61000
1931-07-01 7.37000
1931-08-01 6.87000
1931-09-01 6.68000
1931-10-01 6.09000
1931-11-01 5.91000
1931-12-01 5.37000
1932-01-01 5.68000
1932-02-01 5.28000
1932-03-01 5.38000
1932-04-01 4.12000
1932-05-01 4.62000
1932-06-01 3.98000
1932-07-01 4.61000
1932-08-01 4.14000
1932-09-01 4.85000
1932-10-01 5.14000
1932-11-01 4.51000
1932-12-01 5.11000
1933-01-01 4.18000
1933-02-01 4.65000
1933-03-01 3.54000
1933-04-01 3.62000
1933-05-01 4.24000
1933-06-01 4.13000
1933-07-01 5.16000
1933-08-01 4.72000
1933-09-01 5.09000
1933-10-01 4.55000
1933-11-01 4.20000
1933-12-01 5.08000
1934-01-01 4.62000
1934-02-01 6.44000
1934-03-01 5.20000
1934-04-01 4.07000
1934-05-01 4.54000
1934-06-01 4.51000
1934-07-01 5.04000
1934-08-01 4.64000
1934-09-01 5.22000
1934-10-01 4.67000
1934-11-01 4.23000
1934-12-01 4.95000
1935-01-01 6.44000
1935-02-01 5.07000
1935-03-01 4.57000
1935-04-01 3.94000
1935-05-01 4.63000
1935-06-01 5.38000
1935-07-01 5.48000
1935-08-01 5.23000
1935-09-01 5.87000
1935-10-01 5.55000
1935-11-01 5.03000
1935-12-01 6.18000
1936-01-01 7.74000
1936-02-01 10.9000
1936-03-01 7.63000
1936-04-01 5.71000
1936-05-01 6.02000
1936-06-01 5.45000
1936-07-01 6.71000
1936-08-01 6.54000
1936-09-01 6.96000
1936-10-01 7.13000
1936-11-01 6.90000
1936-12-01 7.10000
1937-01-01 8.86000
1937-02-01 8.58000
1937-03-01 6.96000
1937-04-01 6.17000
1937-05-01 7.09000
1937-06-01 6.75000
1937-07-01 7.52000
1937-08-01 6.91000
1937-09-01 6.91000
1937-10-01 6.53000
1937-11-01 5.39000
1937-12-01 5.54000
1938-01-01 5.40000
1938-02-01 4.70000
1938-03-01 4.69000
1938-04-01 4.07000
1938-05-01 4.20000
1938-06-01 4.06000
1938-07-01 4.82000
1938-08-01 4.48000
1938-09-01 5.80000
1938-10-01 5.84000
1938-11-01 5.20000
1938-12-01 4.88000
1939-01-01 5.24000
1939-02-01 4.98000
1939-03-01 4.54000
1939-04-01 4.15000
1939-05-01 4.50000
1939-06-01 4.58000
1939-07-01 5.28000
1939-08-01 5.01000
1939-09-01 6.25000
1939-10-01 6.51000
1939-11-01 5.66000
1939-12-01 5.62000
1940-01-01 7.36000
1940-02-01 6.16000
1940-03-01 5.04000
1940-04-01 4.53000
1940-05-01 5.06000
1940-06-01 5.18000
1940-07-01 5.77000
1940-08-01 6.21000
1940-09-01 6.69000
1940-10-01 6.34000
1940-11-01 6.52000
1940-12-01 7.06000
1941-01-01 7.21000
1941-02-01 6.62000
1941-03-01 7.78000
1941-04-01 6.26000
1941-05-01 7.86000
1941-06-01 8.92000
1941-07-01 9.64000
1941-08-01 9.98000
1941-09-01 10.2700
1941-10-01 10.5600
1941-11-01 9.60000
1941-12-01 10.0300
1942-01-01 10.8400
1942-02-01 10.0700
1942-03-01 10.7800
1942-04-01 10.4900
1942-05-01 12.5500
1942-06-01 12.1100
1942-07-01 14.6400
1942-08-01 16.3000
1942-09-01 18.4500
1942-10-01 19.8200
1942-11-01 20.1800
1942-12-01 22.0700
1943-01-01 23.5500
1943-02-01 22.2900
1943-03-01 23.8500
1943-04-01 22.6100
1943-05-01 27.2200
1943-06-01 26.4700
1943-07-01 29.4300
1943-08-01 30.9400