Table 2.

General description of included studies in terms of publication year, data collection year, and study wideness

Classification category	Sub-categories	N	Appendix-Index of publication
Publication year	1990–1995	0	–
	1996–2000	2	21, 58
	2001–2005	5	2,6, 12, 52, 57
	2006–2010	10	1, 20, 23, 30, 32, 38, 51, 54, 61, 62
	2011–2017	45	3,4,5,7,8, 9, 10, 11, 13,14, 15, 16, 17, 18,19, 22, 24, 25, 26, 27, 28, 29, 31, 33, 34, 35, 36, 37, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 53, 55, 56, 59, 60
Data Collection year	1990–1995	1	58
	1996–2000	2	2, 57
	2001–2005	8	1,20, 23, 32, 39, 51, 52, 54
	2006–2010	20	3,4, 11, 14, 15, 16, 18, 19, 24, 26, 28, 29, 34, 35, 36, 43, 44, 46, 50, 62
	2011–2017	19	5, 7, 9, 10, 13, 22, 25, 27, 33, 37, 40, 45, 47, 48, 49, 55, 56, 59, 60
	Not clear	12	6, 8, 12, 17, 21, 30, 31, 38, 41,42, 53,61
Study Wideness	Single-country	45	1, 2,4, 5,6, 7,8,10, 11, 12, 14, 15, 17, 18, 19, 20, 22, 23, 24, 25, 26, 28, 29, 30, 32, 33, 35, 39, 40, 41, 42, 43,44, 46, 47, 49, 51, 52, 53, 54, 55, 56, 58, 59, 60
	Cross-countries	17	3,9, 13, 16, 21, 27, 31, 34, 36, 37, 38, 45, 48, 50, 57, 61, 62