Month Metric Tons 1919-01-01 354.000 1919-02-01 365.000 1919-03-01 416.000 1919-04-01 542.000 1919-05-01 634.000 1919-06-01 621.000 1919-07-01 616.000 1919-08-01 482.000 1919-09-01 456.000 1919-10-01 589.000 1919-11-01 710.000 1919-12-01 618.000 1920-01-01 636.000 1920-02-01 610.000 1920-03-01 599.000 1920-04-01 522.000 1920-05-01 470.000 1920-06-01 470.000 1920-07-01 275.000 1920-08-01 358.000 1920-09-01 421.000 1920-10-01 409.000 1920-11-01 358.000 1920-12-01 390.000 1921-01-01 276.000 1921-02-01 232.000 1921-03-01 284.000 1921-04-01 297.000 1921-05-01 230.000 1921-06-01 320.000 1921-07-01 273.000 1921-08-01 324.000 1921-09-01 397.000 1921-10-01 408.000 1921-11-01 452.000 1921-12-01 462..00 1922-01-01 433.000 1922-02-01 417.000 1922-03-01 482.000 1922-04-01 434.000 1922-05-01 490.000 1922-06-01 496.000 1922-07-01 492.000 1922-08-01 483.000 1922-09-01 547.000 1922-10-01 537.000 1922-11-01 536.000 1922-12-01 458.000 1923-01-01 434.000 1923-02-01 412.000 1923-03-01 437.000 1923-04-01 357.000 1923-05-01 345.000 1923-06-01 339.000 1923-07-01 306.000 1923-08-01 363.000 1923-09-01 432.000 1923-10-01 494.000 1923-11-01 426.000 1923-12-01 364.000 1924-01-01 394.000 1924-02-01 370.000 1924-03-01 397.000 1924-04-01 370.000 1924-05-01 458.000 1924-06-01 469.000 1924-07-01 561.000 1924-08-01 522.000 1924-09-01 647.000 1924-10-01 602.000 1924-11-01 523.000 1924-12-01 523.000 1925-01-01 489.000 1925-02-01 476.000 1925-03-01 543.000 1925-04-01 475.000 1925-05-01 529.000 1925-06-01 570.000 1925-07-01 558.000 1925-08-01 530.000 1925-09-01 586.000 1925-10-01 613.000 1925-11-01 578.000 1925-12-01 614.000 1926-01-01 609.000 1926-02-01 544.000 1926-03-01 635.000 1926-04-01 554.000 1926-05-01 529.000 1926-06-01 613.000 1926-07-01 569.000 1926-08-01 525.000 1926-09-01 581.000 1926-10-01 581.000 1926-11-01 474.000 1926-12-01 396.000 1927-01-01 368.000 1927-02-01 416.000 1927-03-01 470.000 1927-04-01 459.000 1927-05-01 456.000 1927-06-01 463.000 1927-07-01 439.000 1927-08-01 478.000 1927-09-01 541.000 1927-10-01 581.000 1927-11-01 579.000 1927-12-01 532.000 1928-01-01 576.000 1928-02-01 568.000 1928-03-01 651.000 1928-04-01 559.000 1928-05-01 610.000 1928-06-01 578.000 1928-07-01 537.000 1928-08-01 548.000 1928-09-01 599.000 1928-10-01 707.000 1928-11-01 614.000 1928-12-01 535.000 1929-01-01 556.000 1929-02-01 482.000 1929-03-01 504.000 1929-04-01 501.000 1929-05-01 473.000 1929-06-01 453.000 1929-07-01 462.000 1929-08-01 416.000 1929-09-01 486.000 1929-10-01 537.000 1929-11-01 416.000 1929-12-01 376.000 1930-01-01 386.000 1930-02-01 367.000 1930-03-01 390.000 1930-04-01 380.000 1930-05-01 386.000 1930-06-01 352.000 1930-07-01 375.000 1930-08-01 388.000 1930-09-01 476.000 1930-10-01 497.000 1930-11-01 418.000 1930-12-01 415.000 1931-01-01 401.000 1931-02-01 380.000 1931-03-01 428.000 1931-04-01 369.000 1931-05-01 318.000 1931-06-01 320.000 1931-07-01 314.000 1931-08-01 262.000 1931-09-01 257.000 1931-10-01 205.000 1931-11-01 175.000 1931-12-01 134.000 1932-01-01 123.000 1932-02-01 153.000 1932-03-01 180.000 1932-04-01 161.000 1932-05-01 185.000 1932-06-01 193.000 1932-07-01 176.000 1932-08-01 208.000 1932-09-01 269.000 1932-10-01 247.000 1932-11-01 203.000 1932-12-01 193.000 1933-01-01 123.000 1933-02-01 160.000 1933-03-01 197.000 1933-04-01 192.000 1933-05-01 249.000 1933-06-01 280.000 1933-07-01 272.000 1933-08-01 249.000 1933-09-01 227.000 1933-10-01 242.000 1933-11-01 225.000 1933-12-01 209.000 1934-01-01 253.000 1934-02-01 256.000 1934-03-01 261.000 1934-04-01 236.000 1934-05-01 225.000 1934-06-01 219.000 1934-07-01 211.000 1934-08-01 219.000 1934-09-01 234.000 1934-10-01 256.000 1934-11-01 243.000 1934-12-01 243.000 1935-01-01 276.000 1935-02-01 264.000 1935-03-01 283.000 1935-04-01 233.000 1935-05-01 267.000 1935-06-01 255.000 1935-07-01 275.000 1935-08-01 232.000 1935-09-01 284.000 1935-10-01 306.000 1935-11-01 248.000 1935-12-01 227.000 1936-01-01 213.000 1936-02-01 175.000 1936-03-01 178.000 1936-04-01 161.000 1936-05-01 166.000 1936-06-01 128.000 1936-07-01 135.000 1936-08-01 124.000 1936-09-01 180.000 1936-10-01 219.000 1936-11-01 214.000 1936-12-01 211.000 1937-01-01 203.000 1937-02-01 194.000 1937-03-01 185.000 1937-04-01 163.000 1937-05-01 148.000 1937-06-01 153.000 1937-07-01 137.000 1937-08-01 134.000 1937-09-01 158.000 1937-10-01 163.000 1937-11-01 174.000 1937-12-01 167.000 1938-01-01 161.000 1938-02-01 150.000 1938-03-01 154.000 1938-04-01 119.000 1938-05-01 144.000 1938-06-01 155.000 1938-07-01 115.000 1938-08-01 131.000 1938-09-01 151.000 1938-10-01 162.000 1938-11-01 173.000 1938-12-01 168.000