Month	Net Ton-Miles Per Freight Train-Miles
1920-01-01	131.500
1920-02-01	133.300
1920-03-01	136.100
1920-04-01	133.600
1920-05-01	134.600
1920-06-01	133.900
1920-07-01	133.100
1920-08-01	132.400
1920-09-01	134.900
1920-10-01	121.000
1920-11-01	130.200
1920-12-01	132.900
1921-01-01	128.600
1921-02-01	126.100
1921-03-01	123.500
1921-04-01	94.2000
1921-05-01	103.800
1921-06-01	101.600
1921-07-01	123.500
1921-08-01	123.300
1921-09-01	124.100
1921-10-01	125.000
1921-11-01	126.100
1921-12-01	124.200
1922-01-01	127.200
1922-02-01	133.100
1922-03-01	130.600
1922-04-01	126.600
1922-05-01	122.400
1922-06-01	116.200
1922-07-01	125.800
1922-08-01	126.800
1922-09-01	127.300
1922-10-01	130.700
1922-11-01	132.000
1922-12-01	129.700
1923-01-01	134.000
1923-02-01	135.100
1923-03-01	137.600
1923-04-01	134.400
1923-05-01	131.700
1923-06-01	132.500
1923-07-01	125.700
1923-08-01	125.300
1923-09-01	133.600
1923-10-01	134.300
1923-11-01	134.400
1923-12-01	131.700
1924-01-01	138.000
1924-02-01	138.700
1924-03-01	137.600
1924-04-01	134.900
1924-05-01	131.300
1924-06-01	126.500
1924-07-01	127.700
1924-08-01	128.200
1924-09-01	132.700
1924-10-01	132.000
1924-11-01	133.000
1924-12-01	130.500
1925-01-01	131.200
1925-02-01	134.100
1925-03-01	133.400
1925-04-01	131.000
1925-05-01	128.700
1925-06-01	124.100
1925-07-01	133.800
1925-08-01	121.200
1925-09-01	127.000
1925-10-01	129.800
1925-11-01	131.900
1925-12-01	132.200
1926-01-01	133.400
1926-02-01	136.300
1926-03-01	135.100
1926-04-01	134.600
1926-05-01	114.100
1926-06-01	106.100
1926-07-01	103.000
1926-08-01	104.700
1926-09-01	110.600
1926-10-01	121.300
1926-11-01	128.100
1926-12-01	131.400
1927-01-01	136.200
1927-02-01	136.000
1927-03-01	134.200
1927-04-01	131.600
1927-05-01	130.800
1927-06-01	129.700
1927-07-01	130.100
1927-08-01	126.000
1927-09-01	129.800
1927-10-01	129.300
1927-11-01	128.000
1927-12-01	127.600
1928-01-01	127.500
1928-02-01	128.400
1928-03-01	130.500
1928-04-01	128.600
1928-05-01	124.400
1928-06-01	123.400
1928-07-01	122.900
1928-08-01	125.400
1928-09-01	130.000
1928-10-01	126.500
1928-11-01	127.300
1928-12-01	129.800
1929-01-01	129.900
1929-02-01	131.900
1929-03-01	136.800
1929-04-01	128.900
1929-05-01	128.500
1929-06-01	128.800
1929-07-01	127.900
1929-08-01	130.300
1929-09-01	132.100
1929-10-01	130.900
1929-11-01	133.500
1929-12-01	130.900
1930-01-01	130.400
1930-02-01	133.400
1930-03-01	130.600
1930-04-01	127.600
1930-05-01	124.900
1930-06-01	120.800
1930-07-01	122.700
1930-08-01	125.400
1930-09-01	125.900
1930-10-01	128.200
1930-11-01	131.400
1930-12-01	130.200
1931-01-01	127.100
1931-02-01	126.600
1931-03-01	126.300
1931-04-01	127.500
1931-05-01	122.100
1931-06-01	122.700
1931-07-01	121.200
1931-08-01	121.800
1931-09-01	123.600
1931-10-01	124.700
1931-11-01	125.100
1931-12-01	127.100