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	9510	87	February			March
April			May			June
July			August			September
October			November			December
2012
Date	Usage	Countries	Date	Usage	Countries	Date	Usage	Countries
January			February			March
April	8727	98	May	8318	103	June
July			August	6516	94	September	7907	90
October			November			December
2011
Date	Usage	Countries	Date	Usage	Countries	Date	Usage	Countries
January	8618	80	February	7828	95	March	-	-
April	8450	94	May	-	-	June	-	-
July	6648	81	August	6858	81	September	7968	98
October	9252	95	November	6100	83	December	7546	90
2010
Date	Usage	Countries	Date	Usage	Countries	Date	Usage	Countries
January	8297	90	February	-	-	March	-	-
April	9358	91	May	-	-	June	7665	89
July	7089	90	August	8211	94	September	-	-
October	8908	92	November	8408	100	December	7023	89
2009
Date	Usage	Countries	Date	Usage	Countries	Date	Usage	Countries
January	7527	86	February	-	-	March	-	-
April	-	-	May	8225	96	June	7802	82
July	6910	83	August	-	-	September	8793	92
October	10088	87	November	9533	96	December	7817	86
2008
Date	Usage	Countries	Date	Usage	Countries	Date	Usage	Countries
January	10,217	90	February	10,114	86	March	11,885	91
April	11,783	97	May	-	-	June	7841	86
July	6539	89	August	6045	83	September	7385	86
October	-	-	November	9207	95	December
2007
Date	Usage	Countries	Date	Usage	Countries	Date	Usage	Countries
January	11,921	98	February	12,100	90	March	11,200	99
April	13,025	112	May	12,948	102	June	10,465	97
July	10,014	90	August	11,254	93	September	16839	108
October	12294	99	November	11603	100	December	7821	92
2006
Date	Usage	Countries	Date	Usage	Countries	Date	Usage	Countries
January	12,874	94	February	14,922	96	March	16,818	98
April	14,872	97	May	14,712	105	June	12,541	92
July	10,085	89	August	11,613	94	September	13,198	96
October	15,006	95	November	14,378	99	December	10,572	91
2005
Date	Usage	Countries	Date	Usage	Countries	Date	Usage	Countries
January	8,199	77	February	9,257	86	March	9,660	85
April	8,978	84	May	8,036	86	June	7,692	80
July	7,134	81	August	8,639	86	September	12,949	101
October	14,493	99	November	14,401	100	December	11,500	92
2004
Date	Usage	Countries	Date	Usage	Countries	Date	Usage	Countries
January	10,554	82	February	11,307	84	March	12,118	87
April	10,867	87	May	9,714	87	June	8,624	82
July	6,990	81	August	7,932	79	September	9,595	85
October	10,655	88	November	9,622	87	December	6,856	80
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