Table 1.

General characteristics of publications

Year published	Total number of papers	Total citations	Mean cite rate per year	Total usage last 6 montha	Total usage last 5 yearsa	Mean use rate last 6 monthb	Mean use rate per year in last 5 yearb
2017	23	25	1.09	36	82	1.57	0.71
2016	26	99	1.90	13	138	0.50	1.06
2015	23	144	2.09	9	143	0.39	1.24
2014	25	224	2.24	8	170	0.32	1.36
2013	28	369	2.64	10	285	0.36	2.04
2012	26	494	3.17	3	211	0.12	1.62
2011	26	396	2.18	6	177	0.23	1.36
2010	16	498	3.89	1	105	0.06	1.31
2009	10	119	1.32	1	23	0.10	0.46
2008	14	487	3.48	1	66	0.07	0.94
2007	11	171	1.41	0	34	0.00	0.62
2006	21	527	2.09	10	107	0.48	1.02
2005	10	765	5.88	2	43	0.20	0.86
2004	13	362	1.99	4	45	0.31	0.69
2003	8	438	3.65	3	32	0.38	0.80
2002	3	60	1.25	1	16	0.33	1.07
2001	17	1023	3.54	1	68	0.06	0.80
2000	17	880	2.88	2	67	0.12	0.79
1999	15	626	2.20	1	39	0.07	0.52
1998	14	519	1.85	1	24	0.07	0.34
1997	7	507	3.45	2	40	0.29	1.14
1996	7	250	1.62	0	10	0.00	0.29
1995	3	69	1.00	0	2	0.00	0.13
1994	5	87	0.73	2	4	0.40	0.16
1993	2	27	0.54	0	0	0.00	0.00
1992	1	10	0.38	0	0	0.00	0.00
1991	1	109	4.04	0	0	0.00	0.00

^aTotal usage: Total number of downloads

^bUse rate: Total number of downloads/Total number of papers