| Month | Min | Max | Mean | St. Dev |
| January | 1930 | 221,940 | 136,288 | 16,161 | February | 2148 | 207,232 | 138,439 | 13212 | March | 3646 | 236,328 | 170,906 | 12,501 | April | 15,348 | 238,981 | 172,893 | 11,899 | May | 6961 | 255,147 | 176,442 | 14,233 | June | 3286 | 250,390 | 167,735 | 14,906 | July | 4026 | 257,094 | 175,074 | 14,788 | August | 11,533 | 249,714 | 178,741 | 12,792 | September | 6624 | 239,322 | 174,338 | 12,143 | October | 2376 | 224,323 | 153,691 | 13,549 | November | 1912 | 216,207 | 135,489 | 15,351 | December | 1858 | 219,516 | 130,485 | 16,523 |
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