| Year | Primary | Secondary | Tertiary | Other | Total |
|---|
| Number of titles | |||||
| 1990 | 245 | 858 | 113 | 14 | 1 230 |
| 1991 | 312 | 823 | 98 | – | 1 233 |
| 1992 | 504 | 723 | 63 | – | 1 290 |
| 1993 | 597 | 754 | 58 | – | 1 409 |
| 1994 | 766 | 884 | 54 | 3 | 1 707 |
| 1995 | 644 | 658 | 121 | 1 | 1 424 |
| 1996 | 680 | 713 | 107 | 45 | 1 545 |
| 1997 | 793 | 724 | 195 | 45 | 1 757 |
| 1998 | 855 | 440 | 288 | 175 | 1 758 |
| 1999 | 932 | 746 | 375 | 393 | 2 446 |
| 2000 | 489 | 419 | 309 | 378 | 1 595 |
| 2001 | 214 | 220 | 307 | 354 | 1 095 |
| 2002 | 1 164 | 640 | 231 | 264 | 2 299 |
| 2003 | 755 | 674 | 305 | 267 | 2 001 |
| 2004 | 598 | 399 | 470 | 327 | 1 794 |
| 2005 | 1 281 | 974 | 419 | 322 | 2 996 |
| 2006 | 1 141 | 845 | 341 | 187 | 2 514 |
| 2007 | 1 086 | 713 | 230 | 296 | 2 325 |
| 2008 | 1 348 | 726 | 304 | 454 | 2 832 |
| 2009 | 1 440 | 719 | 169 | 459 | 2 787 |
| 2010 | 1 045 | 548 | 171 | 371 | 2 135 |
| 2011 | 1 202 | 544 | 187 | 304 | 2 237 |
| 2012 | 969 | 501 | 168 | 369 | 2 007 |
| 2013 | 1 197 | 601 | 184 | 272 | 2 254 |
| 2014 | 929 | 504 | 151 | 326 | 1 910 |
| 2015 | 748 | 367 | 106 | 402 | 1 623 |
| 2016 | 950 | 433 | 91 | 368 | 1 842 |
| 2017 | 792 | 422 | 65 | 289 | 1 568 |
| 2018 | 921 | 477 | 99 | 236 | 1 733 |
| 2019 | 1 325 | 683 | 128 | 298 | 2 434 |
| Copies, thousand | |||||
| 1990 | 13 782 | 8 132 | 261 | 44 | 22 219 |
| 1991 | 14 123 | 8 301 | 148 | – | 22 572 |
| 1992 | 17 112 | 7 457 | 124 | – | 24 693 |
| 1993 | 12 144 | 6 309 | 100 | – | 18 553 |
| 1994 | 12 943 | 5 953 | 94 | 1 | 18 991 |
| 1995 | 12 004 | 6 348 | 221 | 75 | 18 648 |
| 1996 | 11 337 | 4 984 | 193 | 309 | 16 823 |
| 1997 | 11 212 | 4 816 | 296 | 95 | 16 419 |
| 1998 | 10 943 | 2 451 | 349 | 841 | 14 584 |
| 1999 | 12 096 | 5 005 | 635 | 1 703 | 19 439 |
| 2000 | 7 113 | 2 167 | 438 | 1 372 | 11 090 |
| 2001 | 3 559 | 2 083 | 447 | 1 057 | 7 146 |
| 2002 | 15 543 | 4 493 | 277 | 885 | 21 198 |
| 2003 | 6 254 | 4 171 | 267 | 748 | 11 440 |
| 2004 | 6 326 | 2 333 | 392 | 1 196 | 10 247 |
| 2005 | 10 310 | 5 297 | 387 | 814 | 16 808 |
| 2006 | 8 685 | 4 317 | 380 | 367 | 13 749 |
| 2007 | 8 672 | 3 010 | 278 | 711 | 12 671 |
| 2008 | 10 385 | 3 486 | 288 | 797 | 14 956 |
| 2009 | 10 544 | 3 656 | 150 | 868 | 15 218 |
| 2010 | 7 734 | 3 049 | 128 | 923 | 11 834 |
| 2011 | 8 904 | 2 672 | 134 | 375 | 12 085 |
| 2012 | 6 892 | 2 004 | 118 | 591 | 9 605 |
| 2013 | 6 975 | 2 054 | 114 | 413 | 9 556 |
| 2014 | 7 307 | 2 545 | 93 | 388 | 10 333 |
| 2015 | 7 030 | 1 976 | 56 | 433 | 9 495 |
| 2016 | 10 750 | 2 429 | 52 | 451 | 13 682 |
| 2017 | 6 941 | 1 899 | 34 | 369 | 9 244 |
| 2018 | 8 295 | 1 768 | 67 | 302 | 10 432 |
| 2019 | 8 954 | 2 595 | 83 | 371 | 12 003 |