Monthly book distribution reports.
| 3 | 1981-12 | 0 | 1,003,543 | 1,277,703 | 2,503,027 | 1,552,122 | 437 | 0 | 6,336,832 |
| 4 | 1982-12 | 625,703 | 1,394,657 | 1,231,729 | 2,494,293 | 2,545,276 | 0 | 0 | 8,291,658 |
| 5 | 1983-12 | 1,295,769 | 1,291,156 | 2,071,167 | 2,820,980 | 5,630,291 | 0 | 0 | 13,109,363 |
| 6 | 1984-12 | 1,274,011 | 1,246,074 | 1,647,507 | 2,157,540 | 3,571,696 | 0 | 0 | 9,896,828 |
| 7 | 1985-12 | 1,110,524 | 1,101,070 | 1,723,297 | 2,769,947 | 3,599,820 | 0 | 0 | 10,304,658 |
| 8 | 1986-12 | 313,315 | 370,756 | 683,850 | 1,275,385 | 1,151,126 | 0 | 0 | 3,794,432 |
| 9 | 1987-12 | 156,950 | 324,993 | 398,000 | 197,015 | 262,283 | 0 | 635 | 1,339,241 |
| 10 | 1988-12 | 112,671 | 102,488 | 382,123 | 194,926 | 310,145 | 0 | 0 | 1,102,353 |
| 11 | 1989-12 | 635,507 | 883,493 | 792,809 | 2,367,604 | 919,100 | 0 | 0 | 5,598,513 |
| 12 | 1990-12 | 861,842 | 1,649,919 | 863,275 | 2,439,717 | 1,240,142 | 0 | 0 | 7,054,895 |
| 13 | 1991-12 | 1,734,345 | 1,793,137 | 1,121,094 | 2,629,419 | 1,191,486 | 0 | 0 | 8,469,481 |
| 14 | 1992-12 | 1,948,956 | 1,778,207 | 1,307,203 | 2,804,946 | 1,236,394 | 61,800 | 0 | 9,137,506 |
| 15 | 1993-12 | 1,919,252 | 1,795,262 | 1,672,280 | 2,513,171 | 1,594,039 | 51,516 | 0 | 9,545,520 |
| 16 | 1994-12 | 1,480,498 | 1,911,606 | 2,109,224 | 2,670,245 | 1,749,193 | 60,111 | 0 | 9,980,877 |
| 17 | 1995-12 | 1,420,595 | 1,750,271 | 1,898,255 | 2,590,005 | 1,295,415 | 21,773 | 1,882 | 8,976,314 |
| 18 | 1996-12 | 1,636,336 | 1,628,228 | 1,769,731 | 2,070,751 | 2,072,118 | 30,268 | 11,594 | 9,207,432 |
| 19 | 1997-12 | 1,203,733 | 1,096,793 | 1,355,271 | 1,679,149 | 1,212,217 | 30,402 | 5,560 | 6,577,565 |
| 20 | 1998-12 | 1,184,943 | 790,348 | 896,434 | 1,222,575 | 727,475 | 13,085 | 4,018 | 4,834,860 |
| 21 | 1999-12 | 767,018 | 466,738 | 471,289 | 831,038 | 663,176 | 7,379 | 6,498 | 3,206,638 |
| 22 | 2000-12 | 653,816 | 473,697 | 444,785 | 896,307 | 376,538 | 9,661 | 5,851 | 2,854,804 |
| 23 | 2001-12 | 665,524 | 493,452 | 517,867 | 1,027,312 | 213,261 | 5,089 | 6,343 | 2,922,505 |
| 24 | 2002-12 | 723,801 | 504,222 | 609,893 | 730,043 | 267,192 | 2,712 | 2,177 | 2,837,863 |
| 25 | 2003-12 | 917,859 | 524,723 | 738,218 | 935,657 | 500,492 | 15,236 | 3,179 | 3,632,185 |
| 26 | 2004-12 | 1,089,333 | 630,349 | 722,094 | 1,256,876 | 624,073 | 4,140 | 4,139 | 4,326,865 |
| 27 | 2005-12 | 1,262,471 | 632,693 | 681,062 | 1,334,272 | 483,526 | 21,064 | 6,122 | 4,415,088 |
| 28 | 2006-12 | 1,426,394 | 577,939 | 556,797 | 1,420,886 | 501,738 | 23,322 | 4,464 | 4,507,076 |
| 29 | 2007-12 | 1,669,317 | 588,993 | 660,209 | 1,573,396 | 842,686 | 30,405 | 4,761 | 5,365,006 |
| 30 | 2008-12 | 1,691,843 | 472,804 | 685,855 | 1,726,243 | 826,991 | 33,549 | 4,194 | 5,437,285 |
| 31 | 2009-12 | 2,037,309 | 464,624 | 654,889 | 1,646,039 | 1,225,205 | 19,949 | 6,214 | 6,048,015 |
| 32 | 2010-12 | 2,262,023 | 433,839 | 615,792 | 1,809,889 | 1,261,076 | 37,285 | 7,306 | 6,419,904 |
| 33 | 2011-01 | 66,721 | 16,091 | 23,404 | 104,121 | 130,934 | 3,118 | 530 | 0 |
| 34 | 2011-02 | 31,906 | 10,738 | 20,258 | 86,936 | 54,118 | 2,505 | 99 | 0 |
| 35 | 2011-03 | 13,183 | 11,396 | 10,284 | 52,517 | 6,977 | 120 | 43 | 0 |
| 36 | 2011-04 | 58,649 | 25,367 | 31,272 | 124,599 | 56,393 | 3,098 | 739 | 0 |
| 37 | 2011-05 | 77,857 | 37,624 | 42,333 | 146,986 | 73,378 | 2,144 | 535 | 0 |
| 38 | 2011-06 | 75,649 | 28,849 | 35,328 | 154,845 | 64,560 | 2,863 | 889 | 0 |
| 39 | 2011-07 | 104,942 | 26,269 | 32,168 | 184,954 | 68,353 | 3,085 | 874 | 0 |
| 40 | 2011-08 | 94,328 | 41,351 | 48,882 | 189,805 | 133,814 | 4,396 | 605 | 0 |
| 41 | 2011-09 | 65,480 | 17,582 | 27,330 | 151,356 | 83,771 | 1,133 | 455 | 0 |
| 42 | 2011-10 | 80,320 | 54,812 | 64,558 | 225,261 | 136,739 | 4,789 | 295 | 0 |
| 43 | 2011-11 | 115,804 | 19,640 | 27,116 | 114,455 | 52,737 | 2,286 | 302 | 0 |
| 44 | 2011-12 | 2,705,435 | 541,666 | 815,746 | 2,638,136 | 992,269 | 40,842 | 9,304 | 7,112,223 |
| 45 | 2012-01 | 89,952 | 18,814 | 20,216 | 86,078 | 51,584 | 3,624 | 1,250 | 0 |
| 46 | 2012-02 | 90,989 | 16,000 | 39,057 | 128,910 | 84,412 | 2,406 | 619 | 0 |
| 47 | 2012-03 | 41,071 | 23,842 | 29,320 | 125,116 | 107,275 | 3,481 | 205 | 0 |
| 48 | 2012-04 | 58,827 | 21,290 | 30,681 | 198,664 | 46,780 | 2,945 | 542 | 0 |
| 49 | 2012-05 | 76,094 | 35,412 | 37,287 | 111,748 | 48,878 | 3,089 | 534 | 0 |
| 50 | 2012-06 | 84,281 | 31,155 | 38,028 | 140,745 | 111,402 | 6,385 | 389 | 0 |