Month	Dollars Per Thousand
1922-01-01	13.8700
1922-02-01	13.7500
1922-03-01	13.6100
1922-04-01	13.5300
1922-05-01	13.5100
1922-06-01	13.5700
1922-07-01	13.6600
1922-08-01	13.5600
1922-09-01	13.7400
1922-10-01	13.8500
1922-11-01	13.9000
1922-12-01	13.8800
1923-01-01	13.8900
1923-02-01	13.9700
1923-03-01	14.2400
1923-04-01	14.4700
1923-05-01	14.5600
1923-06-01	14.7000
1923-07-01	14.7000
1923-08-01	14.6800
1923-09-01	14.6900
1923-10-01	14.7500
1923-11-01	14.7500
1923-12-01	14.6800
1924-01-01	14.6200
1924-02-01	14.5900
1924-03-01	14.5600
1924-04-01	14.5800
1924-05-01	14.5500
1924-06-01	14.5900
1924-07-01	14.4200
1924-08-01	14.3800
1924-09-01	14.3300
1924-10-01	14.3400
1924-11-01	14.3100
1924-12-01	14.2400
1925-01-01	14.1400
1925-02-01	14.1600
1925-03-01	14.1300
1925-04-01	14.1600
1925-05-01	14.1400
1925-06-01	14.0000
1925-07-01	13.9400
1925-08-01	13.8700
1925-09-01	13.8600
1925-10-01	13.8700
1925-11-01	13.8800
1925-12-01	13.9000
1926-01-01	13.9600
1926-02-01	13.9600
1926-03-01	13.9700
1926-04-01	13.9200
1926-05-01	13.9200
1926-06-01	13.8800
1926-07-01	13.8800
1926-08-01	13.9000
1926-09-01	13.9200
1926-10-01	13.9200
1926-11-01	13.8600
1926-12-01	13.8500
1927-01-01	14.1000
1927-02-01	14.1200
1927-03-01	14.1000
1927-04-01	14.0700
1927-05-01	14.0500
1927-06-01	14.0300
1927-07-01	13.9900
1927-08-01	13.9800
1927-09-01	13.9700
1927-10-01	14.0000
1927-11-01	13.9500
1927-12-01	13.9100
1928-01-01	13.9100
1928-02-01	13.8000
1928-03-01	13.8000
1928-04-01	13.8000
1928-05-01	13.7400
1928-06-01	13.7200
1928-07-01	13.6800
1928-08-01	13.6500
1928-09-01	13.6500
1928-10-01	13.6100
1928-11-01	13.6100
1928-12-01	13.6200
1929-01-01	13.6300
1929-02-01	13.6400
1929-03-01	13.6500
1929-04-01	13.6300
1929-05-01	13.6600
1929-06-01	13.7000
1929-07-01	13.6000
1929-08-01	13.6200
1929-09-01	13.5700
1929-10-01	13.5600
1929-11-01	13.5600
1929-12-01	13.5600
1930-01-01	13.5500
1930-02-01	13.5000
1930-03-01	13.5400
1930-04-01	13.4800
1930-05-01	13.4100
1930-06-01	12.9200
1930-07-01	12.8800
1930-08-01	12.7600
1930-09-01	12.6900
1930-10-01	12.6500
1930-11-01	12.6500
1930-12-01	12.6000
1931-01-01	12.6200
1931-02-01	12.5600
1931-03-01	12.5500
1931-04-01	12.5200
1931-05-01	12.5000
1931-06-01	12.4900
1931-07-01	12.4000
1931-08-01	12.4000
1931-09-01	12.2200
1931-10-01	12.2400
1931-11-01	12.1000
1931-12-01	12.1300