Month	Millions Of Ton-Kilometers
1921-04-01	4406.00
1921-05-01	3973.00
1921-06-01	4150.00
1921-07-01	4074.00
1921-08-01	4691.00
1921-09-01	4831.00
1921-10-01	5558.00
1921-11-01	5231.00
1921-12-01	4665.00
1922-01-01	4777.00
1922-02-01	3859.00
1922-03-01	5772.00
1922-04-01	6146.00
1922-05-01	5932.00
1922-06-01	5332.00
1922-07-01	5269.00
1922-08-01	5892.00
1922-09-01	5758.00
1922-10-01	6453.00
1922-11-01	6201.00
1922-12-01	5567.00
1923-01-01	4134.00
1923-02-01	3422.00
1923-03-01	3950.00
1923-04-01	3040.00
1923-05-01	3426.00
1923-06-01	3647.00
1923-07-01	3483.00
1923-08-01	3285.00
1923-09-01	2767.00
1923-10-01	2954.00
1923-11-01	2798.00
1923-12-01	2580.00
1924-01-01	2640.00
1924-02-01	2940.00
1924-03-01	3255.00
1924-04-01	3580.00
1924-05-01	3324.00
1924-06-01	2816.00
1924-07-01	2993.00
1924-08-01	3057.00
1924-09-01	3557.00
1924-10-01	4404.00
1924-11-01	4607.00
1924-12-01	4598.00
1925-01-01	4781.00
1925-02-01	4688.00
1925-03-01	4882.00
1925-04-01	4311.00
1925-05-01	4273.00
1925-06-01	7291.00
1925-07-01	5001.00
1925-08-01	4651.00
1925-09-01	4905.00
1925-10-01	5280.00
1925-11-01	4708.00
1925-12-01	4198.00
1926-01-01	3796.00
1926-02-01	3905.00
1926-03-01	4423.00
1926-04-01	4114.00
1926-05-01	4130.00
1926-06-01	4686.00
1926-07-01	5008.00
1926-08-01	5056.00
1926-09-01	5233.00
1926-10-01	5761.00
1926-11-01	5801.00
1926-12-01	5196.00
1927-01-01	4871.00
1927-02-01	5260.00
1927-03-01	5953.00
1927-04-01	5228.00
1927-05-01	5327.00
1927-06-01	5126.00
1927-07-01	5406.00
1927-08-01	5452.00
1927-09-01	5637.00
1927-10-01	6064.00
1927-11-01	5889.00
1927-12-01	5398.00
1928-01-01	5593.00
1928-02-01	5481.00
1928-03-01	6011.00
1928-04-01	4861.00
1928-05-01	5151.00
1928-06-01	5528.00
1928-07-01	5524.00
1928-08-01	5835.00
1928-09-01	6258.00
1928-10-01	6049.00
1928-11-01	5332.00
1928-12-01	4715.00
1929-01-01	5216.00
1929-02-01	5368.00
1929-03-01	6669.00
1929-04-01	5746.00
1929-05-01	5506.00
1929-06-01	5603.00
1929-07-01	5976.00
1929-08-01	5924.00
1929-09-01	5894.00
1929-10-01	6367.00
1929-11-01	5792.00
1929-12-01	4874.00
1930-01-01	4763.00
1930-02-01	4469.00
1930-03-01	5013.00
1930-04-01	4297.00
1930-05-01	4849.00
1930-06-01	4502.00
1930-07-01	4723.00
1930-08-01	4497.00
1930-09-01	4728.00
1930-10-01	4819.00
1930-11-01	4164.00
1930-12-01	3846.00
1931-01-01	3768.00
1931-02-01	3706.00
1931-03-01	4289.00
1931-04-01	4016.00
1931-05-01	3888.00
1931-06-01	4162.00
1931-07-01	3872.00
1931-08-01	3575.00
1931-09-01	3829.00
1931-10-01	4038.00
1931-11-01	3516.00
1931-12-01	2839.00
1932-01-01	2747.00
1932-02-01	3198.00
1932-03-01	3407.00
1932-04-01	3256.00
1932-05-01	2963.00
1932-06-01	3319.00
1932-07-01	3031.00
1932-08-01	3193.00
1932-09-01	3499.00
1932-10-01	3701.00
1932-11-01	3486.00
1932-12-01	3105.00
1933-01-01	3237.00
1933-02-01	3081.00
1933-03-01	3655.00
1933-04-01	2901.00
1933-05-01	3291.00
1933-06-01	3366.00
1933-07-01	3345.00
1933-08-01	3494.00
1933-09-01	3804.00
1933-10-01	3789.00
1933-11-01	3805.00
1933-12-01	3903.00
1934-01-01	4076.00
1934-02-01	3810.00
1934-03-01	4218.00
1934-04-01	3657.00
1934-05-01	3688.00
1934-06-01	4290.00
1934-07-01	4089.00
1934-08-01	4375.00
1934-09-01	4495.00
1934-10-01	4809.00
1934-11-01	4512.00
1934-12-01	4154.00
1935-01-01	4506.00
1935-02-01	4142.00
1935-03-01	4694.00
1935-04-01	4108.00
1935-05-01	4425.00
1935-06-01	4475.00
1935-07-01	4801.00
1935-08-01	5003.00
1935-09-01	5281.00
1935-10-01	5595.00
1935-11-01	5273.00
1935-12-01	4651.00
1936-01-01	4883.00
1936-02-01	4612.00
1936-03-01	5248.00
1936-04-01	4714.00
1936-05-01	5072.00
1936-06-01	5263.00
1936-07-01	5434.00
1936-08-01	5143.00
1936-09-01	5728.00
1936-10-01	6184.00
1936-11-01	5610.00
1936-12-01	5423.00
1937-01-01	5352.00
1937-02-01	5361.00
1937-03-01	5624.00
1937-04-01	5967.00
1937-05-01	5389.00
1937-06-01	5992.00
1937-07-01	6523.00
1937-08-01	6158.00
1937-09-01	6415.00
1937-10-01	6659.00
1937-11-01	6439.00
1937-12-01	6324.00