Table 1. Number of Articles by Publication Year

Year	Number	Percentage(%)
1992	1	2.2
1993	1	2.2
1994	1	2.2
1995	1	2.2
1996	2	4.4
1997	1	2.2
2000	2	4.4
2001	2	4.4
2002	1	2.2
2003	3	6.7
2004	5	11.1
2005	1	2.2
2006	2	4.4
2007	1	2.2
2008	3	6.7
2009	2	4.4
2010	3	6.7
2011	1	2.2
2015	1	2.2
2016	2	4.4
2017	2	4.4
2018	1	2.2
2019	4	8.9
2020	2	4.4
Total	45	100