"Month", 1958, 1959, 1960 "JAN", 340, 360, 417 "FEB", 318, 342, 391 "MAR", 362, 406, "error1" "APR", 348, 396, 461 "MAY", 363, 420, 472 "JUN", 435, "error2", 535 "JUL", 491, 548, 622 "AUG", 505, 559, 606 "SEP", 404, 463, "error0" "OCT", 359, 407, 461 "NOV", 310, 362, 390 "DEC", 337, 405, 432