Month	Car-Miles Per Train-Mile
1920-01-01	4.05000
1920-02-01	4.04000
1920-03-01	4.05000
1920-04-01	4.14000
1920-05-01	4.17000
1920-06-01	4.30000
1920-07-01	4.47000
1920-08-01	4.53000
1920-09-01	4.50000
1920-10-01	4.27000
1920-11-01	4.21000
1920-12-01	4.22000
1921-01-01	4.18000
1921-02-01	4.06000
1921-03-01	4.08000
1921-04-01	4.08000
1921-05-01	4.05000
1921-06-01	4.18000
1921-07-01	4.35000
1921-08-01	4.33000
1921-09-01	4.34000
1921-10-01	4.15000
1921-11-01	4.08000
1921-12-01	4.10000
1922-01-01	4.08000
1922-02-01	4.02000
1922-03-01	4.04000
1922-04-01	4.08000
1922-05-01	4.07000
1922-06-01	4.31000
1922-07-01	4.37000
1922-08-01	4.39000
1922-09-01	4.37000
1922-10-01	4.20000
1922-11-01	4.12000
1922-12-01	4.16000
1923-01-01	4.14000
1923-02-01	4.05000
1923-03-01	4.09000
1923-04-01	4.14000
1923-05-01	4.13000
1923-06-01	4.33000
1923-07-01	4.44000
1923-08-01	4.48000
1923-09-01	4.48000
1923-10-01	4.25000
1923-11-01	4.16000
1923-12-01	4.25000
1924-01-01	4.17000
1924-02-01	4.13000
1924-03-01	4.13000
1924-04-01	4.17000
1924-05-01	4.15000
1924-06-01	4.36000
1924-07-01	4.43000
1924-08-01	4.50000
1924-09-01	4.43000
1924-10-01	4.23000
1924-11-01	4.20000
1924-12-01	4.23000
1925-01-01	4.25000
1925-02-01	4.20000
1925-03-01	4.20000
1925-04-01	4.25000
1925-05-01	4.25000
1925-06-01	4.47000
1925-07-01	4.60000
1925-08-01	4.69000
1925-09-01	4.66000
1925-10-01	4.43000
1925-11-01	4.41000
1925-12-01	4.42000
1926-01-01	4.43000
1926-02-01	4.36000
1926-03-01	4.34000
1926-04-01	4.36000
1926-05-01	4.41000
1926-06-01	4.62000
1926-07-01	4.73000
1926-08-01	4.74000
1926-09-01	4.73000
1926-10-01	4.51000
1926-11-01	4.44000
1926-12-01	4.48000
1927-01-01	4.53000
1927-02-01	4.46000
1927-03-01	4.45000
1927-04-01	4.49000
1927-05-01	4.53000
1927-06-01	4.68000
1927-07-01	4.82000
1927-08-01	4.79000
1927-09-01	4.81000
1927-10-01	4.61000
1927-11-01	4.53000
1927-12-01	4.56000
1928-01-01	4.59000
1928-02-01	4.54000
1928-03-01	4.55000
1928-04-01	4.60000
1928-05-01	4.54000
1928-06-01	4.78000
1928-07-01	4.92000
1928-08-01	4.92000
1928-09-01	4.91000
1928-10-01	4.71000
1928-11-01	4.57000
1928-12-01	4.66000
1929-01-01	4.72000
1929-02-01	4.70000
1929-03-01	4.75000
1929-04-01	4.71000
1929-05-01	4.70000
1929-06-01	4.96000
1929-07-01	5.02000
1929-08-01	5.05000
1929-09-01	5.02000
1929-10-01	4.76000
1929-11-01	4.72000
1929-12-01	4.74000
1930-01-01	4.31000
1930-02-01	4.30000
1930-03-01	4.32000
1930-04-01	4.27000
1930-05-01	4.27000
1930-06-01	4.50000
1930-07-01	4.55000
1930-08-01	4.57000
1930-09-01	4.54000
1930-10-01	4.29000
1930-11-01	4.26000
1930-12-01	4.32000