Table 2.

General characteristics of publications.

Year Published	Total Number of Papers	Total Citations	Mean Cite Rate per Year	Total Usage in the Last 6 Months	Total Usage in the Last 5 Years	Mean Use Rate in the Last 6 Months	Mean Use Rate in the Last 5 Years
2018	358	345	0.96	1968	3289	5.50	1.84
2017	273	1571	2.88	903	4139	3.31	3.03
2016	157	1149	2.44	287	2542	1.83	3.24
2015	152	1720	2.83	196	2424	1.29	3.19
2014	131	1884	2.88	136	2193	1.04	3.35
2013	100	1725	2.88	75	1819	0.75	3.64
2012	80	1903	3.40	85	1480	1.06	3.70
2011	91	3086	4.24	128	1724	1.41	3.79
2010	64	1827	3.17	42	708	0.66	2.21
2009	54	2481	4.59	58	859	1.07	3.18
2008	44	1751	3.62	32	483	0.73	2.20
2007	39	2032	4.34	25	438	0.64	2.25
2006	39	1956	3.86	33	503	0.85	2.58
2005	15	694	3.30	10	136	0.67	1.81
2004	23	650	1.88	6	75	0.26	0.65
2003	21	1373	4.09	20	222	0.95	2.11
2002	13	243	1.10	5	27	0.38	0.42
2001	8	304	2.11	3	39	0.38	0.98
2000	8	672	4.42	9	89	1.13	2.23
1999	8	494	3.09	4	65	0.50	1.63
1998	3	26	0.41	1	1	0.33	0.07
1997	8	926	5.26	13	122	1.63	3.05
1995	3	25	0.35	0	3	0.00	0.20
1994	2	51	1.02	0	2	0.00	0.20
1993	3	51	0.65	0	2	0.00	0.13
1992	1	10	0.37	0	1	0.00	0.20
1991	2	4	0.07	0	2	0.00	0.20