Table 3.

Number of videos included in the study (N=100) by year of upload.

Year	Uploaded videos, n
2007	2
2008	1
2009	0
2010	2
2011	2
2012	5
2013	8
2014	9
2015	12
2016	9
2017	14
2018	13
2019	16
2020	6
2021	1