Month	Millions Of Train-Miles
1920-01-01	12.7200
1920-02-01	11.8300
1920-03-01	13.3100
1920-04-01	11.7900
1920-05-01	12.2300
1920-06-01	12.6200
1920-07-01	12.8700
1920-08-01	11.9000
1920-09-01	12.4900
1920-10-01	10.1400
1920-11-01	11.2100
1920-12-01	11.6400
1921-01-01	11.2000
1921-02-01	10.1200
1921-03-01	10.3100
1921-04-01	6.34000
1921-05-01	4.80000
1921-06-01	5.13000
1921-07-01	8.81000
1921-08-01	10.6200
1921-09-01	10.4400
1921-10-01	10.5900
1921-11-01	10.8500
1921-12-01	10.5100
1922-01-01	10.3800
1922-02-01	10.2400
1922-03-01	11.6900
1922-04-01	9.76000
1922-05-01	11.2600
1922-06-01	9.98000
1922-07-01	10.8700
1922-08-01	11.4700
1922-09-01	11.4900
1922-10-01	11.8100
1922-11-01	11.8800
1922-12-01	11.0200
1923-01-01	12.0600
1923-02-01	11.1400
1923-03-01	12.3200
1923-04-01	11.3800
1923-05-01	12.1300
1923-06-01	12.1200
1923-07-01	11.7200
1923-08-01	11.9100
1923-09-01	11.6500
1923-10-01	12.9000
1923-11-01	12.3400
1923-12-01	11.4700
1924-01-01	10.3900
1924-02-01	12.3600
1924-03-01	12.9700
1924-04-01	11.9000
1924-05-01	12.7800
1924-06-01	10.9700
1924-07-01	12.3700
1924-08-01	11.5400
1924-09-01	12.2600
1924-10-01	12.8000
1924-11-01	11.7700
1924-12-01	11.7500
1925-01-01	12.3500
1925-02-01	11.4000
1925-03-01	12.3400
1925-04-01	11.2400
1925-05-01	11.7400
1925-06-01	11.0300
1925-07-01	12.4400
1925-08-01	11.0500
1925-09-01	11.7200
1925-10-01	12.4000
1925-11-01	11.5500
1925-12-01	11.8800
1926-01-01	12.0000
1926-02-01	11.5000
1926-03-01	12.9400
1926-04-01	11.5800
1926-05-01	3.96000
1926-06-01	6.91000
1926-07-01	7.29000
1926-08-01	7.48000
1926-09-01	8.23000
1926-10-01	9.43000
1926-11-01	10.2200
1926-12-01	11.3800
1927-01-01	12.1400
1927-02-01	11.5400
1927-03-01	13.0000
1927-04-01	11.3500
1927-05-01	12.2000
1927-06-01	11.5700
1927-07-01	11.9000
1927-08-01	12.1100
1927-09-01	12.1700
1927-10-01	12.2500
1927-11-01	12.1900
1927-12-01	11.7700
1928-01-01	11.8100
1928-02-01	11.5600
1928-03-01	12.5000
1928-04-01	10.6100
1928-05-01	11.7200
1928-06-01	11.5000
1928-07-01	11.4100
1928-08-01	11.5700
1928-09-01	11.4100
1928-10-01	12.5200
1928-11-01	11.9700
1928-12-01	11.0900
1929-01-01	12.2400
1929-02-01	11.1900
1929-03-01	12.0500
1929-04-01	11.9200
1929-05-01	12.0800
1929-06-01	11.4600
1929-07-01	12.3500
1929-08-01	12.0600
1929-09-01	11.8500
1929-10-01	12.9500
1929-11-01	12.4200
1929-12-01	11.6000
1930-01-01	12.5500
1930-02-01	11.4600
1930-03-01	12.3400
1930-04-01	11.2700
1930-05-01	12.3200
1930-06-01	10.5700
1930-07-01	11.8000
1930-08-01	10.9900
1930-09-01	11.5500
1930-10-01	12.1700
1930-11-01	11.1600
1930-12-01	11.2900
1931-01-01	11.4700
1931-02-01	10.5500
1931-03-01	11.2900
1931-04-01	10.4900
1931-05-01	10.5500
1931-06-01	10.9000
1931-07-01	11.2100
1931-08-01	10.3900
1931-09-01	11.0600
1931-10-01	11.6000
1931-11-01	10.6900
1931-12-01	10.8400