Quarter	Thousands Of Hours
1931-01-01	3910.00
1931-04-01	3442.00
1931-07-01	3460.00
1931-10-01	3619.00
1932-01-01	3475.00
1932-04-01	3124.00
1932-07-01	3060.00
1932-10-01	3288.00
1933-01-01	3358.00
1933-04-01	2951.00
1933-07-01	3144.00
1933-10-01	3620.00
1934-01-01	3779.00
1934-04-01	3240.00
1934-07-01	3337.00
1934-10-01	3625.00
1935-01-01	3606.00
1935-04-01	3213.00
1935-07-01	3340.00
1935-10-01	3904.00
1936-01-01	4149.00
1936-04-01	3458.00
1936-07-01	3584.00
1936-10-01	4226.00
1937-01-01	4220.00
1937-04-01	3880.00
1937-07-01	3866.00
1937-10-01	4454.00
1938-01-01	4214.00
1938-04-01	3476.00
1938-07-01	3376.00
1938-10-01	3754.00
1939-01-01	3847.00