Usage of Electronic Monograph

The following table shows the approximate usage of the monograph since April 1998. "Usage" is defined as the number of different computers that have accessed the monograph each month. The access file, which contains all the "hits" to the monograph, is processed so that only unique computer addresses are listed, and are only counted once per month. The country extension is also stripped off the computer address, and the number of different foreign countries is counted per month.

2013
Date Usage Countries Date Usage Countries Date Usage Countries
January 951087 February March
April May June
July August September
October November December
2012
Date Usage Countries Date Usage Countries Date Usage Countries
January February March
April872798 May8318103 June
July August651694 September790790
October November December
2011
Date Usage Countries Date Usage Countries Date Usage Countries
January 861880 February782895 March--
April845094 May-- June--
July664881 August685881 September796898
October925295 November610083 December754690
2010
Date Usage Countries Date Usage Countries Date Usage Countries
January 829790 February-- March--
April935891 May-- June766589
July708990 August821194 September--
October890892 November8408100 December702389
2009
Date Usage Countries Date Usage Countries Date Usage Countries
January 752786 February-- March--
April-- May822596 June780282
July691083 August-- September879392
October1008887 November953396 December781786
2008
Date Usage Countries Date Usage Countries Date Usage Countries
January 10,21790 February10,11486 March11,88591
April11,78397 May-- June784186
July653989 August604583September738586
October-- November920795 December
2007
Date Usage Countries Date Usage Countries Date Usage Countries
January 11,92198 February12,10090 March11,20099
April13,025112 May12,948102 June10,46597
July10,01490 August11,25493September16839108
October1229499 November11603100 December782192
2006
Date Usage Countries Date Usage Countries Date Usage Countries
January 12,87494 February14,92296 March16,81898
April14,87297 May14,712105 June12,54192
July10,08589 August11,61394September13,19896
October15,00695 November14,37899 December10,57291
2005
Date Usage Countries Date Usage Countries Date Usage Countries
January 8,19977 February9,25786 March9,66085
April8,97884 May8,03686 June7,69280
July7,13481 August8,63986September12,949101
October14,49399 November14,401100 December11,50092
2004
Date Usage Countries Date Usage Countries Date Usage Countries
January10,55482 February11,30784 March12,11887
April10,86787 May9,71487June8,62482
July6,99081 August7,93279 September9,59585
October10,65588 November9,62287December6,85680
2003
Date Usage Countries Date Usage Countries Date Usage Countries
January 9,442 81 February 10,653 83 March 11,717 87
April *0 * 0 May * 0 * 0 June 10,266 83
July 9,604 83 August 7,294 79 September 9,757 76
October 11,077 86 November 11,531 88 December 9,638 82
2002
Date Usage Countries Date Usage Countries Date Usage Countries
January 6,625 79 February 7,734 79 March 9,619 83
April 10,820 83 May 9,753 89 June 8,420 74
July 9,030 86 August 8,689 83 September 9,060 85
October 11,056 85 November 9,397 76 December 8,274 82
2001
Date Usage Countries Date Usage Countries Date Usage Countries
January 3,113 63 February 3,534 67 March * 0 * 0
April * 0 * 0 May 1201 * *53 June 4,220 65
July 3,971 70 August 4,100 66 September 5,500 68
October 7,055 79 November 6,934 76 December 5,749 76
2000
January 1,247 47 February 1,587 51 March 1,247 45
April 1,293 48 May 1,276 48 June 1,522 51
July 1,835 57 August 1,992 55 September 2,417 58
October 3,749 61 November 2,826 59 December 2,318 58
1999
Date Usage Countries Date Usage Countries Date Usage Countries
January 1,565 61 February 1,378 52 March 1,301 49
April 967 48 May 1,135 50 June 958 45
July 839 50 August 759 44 September 777 43
October 983 46 November 1,274 49 December 1,179 48
1998
Date Usage Countries Date Usage Countries Date Usage Countries
January - March - No statistics
April 1,135 52 May 997 52 June 1,164 52
July 745 43 August 997 47 September 870 48
October 1337 58 November 1280 54 December 1,177 53