Table 2.

General characteristics of publications

Year published	Total number of papers	Total citations	Mean cite rate per year	Total usage last 6 month	Total usage last 5 years	Mean use rate last 6 month	Mean use rate last 5 year
2018	700	737	1.05	1953	3045	2.79	0.87
2017	659	3666	2.78	989	4769	1.50	1.45
2016	578	6871	3.96	697	6667	1.21	2.31
2015	552	8684	3.93	533	6975	0.97	2.53
2014	464	9118	3.93	343	5737	0.74	2.47
2013	463	12,830	4.62	314	7335	0.68	3.17
2012	431	13,162	4.36	273	5818	0.63	2.70
2011	365	12,192	4.18	214	4187	0.59	2.29
2010	309	12,414	4.46	209	3095	0.68	2.00
2009	269	12,780	4.75	152	2357	0.57	1.75
2008	238	9916	3.79	125	1963	0.53	1.65
2007	241	14,878	5.14	109	1883	0.45	1.56
2006	184	12,221	5.11	71	1328	0.39	1.44
2005	182	14,436	5.67	64	1361	0.35	1.50
2004	159	15,142	6.35	118	1958	0.74	2.46
2003	119	9924	5.21	47	737	0.39	1.24
2002	103	14,757	8.43	48	958	0.47	1.86
2001	72	7578	5.85	30	493	0.42	1.37
2000	77	7457	5.10	17	397	0.22	1.03
1999	66	6225	4.72	24	421	0.36	1.28
1998	58	3524	2.89	14	221	0.24	0.76
1997	35	2735	3.55	12	229	0.34	1.31
1996	36	2995	3.62	6	104	0.17	0.58
1995	23	3295	5.97	3	147	0.13	1.28
1994	23	1451	2.52	5	70	0.22	0.61
1993	26	842	1.25	6	29	0.23	0.22
1992	13	599	1.71	0	31	0.00	0.48
1991	11	2880	9.35	6	71	0.55	1.29
1990	1	40	1.38	0	1	0.00	0.20