Table 1.

Length of time between hookah bar opening and first Yelp review by year.

Real year opened	Number of hookah bars	Difference between date opening and first Yelp review (months)a
2006	2	34.5
2007	0	—
2008	1	22
2009	2	13
2010	6	3.5
2011	3	5.33
2012	11	3.18
2013	6	6.33
2014	12	0.75

^aDifference calculated for the 43 hookah bars where date of opening could be verified and where the date was after Yelp’s founding (ie, after October 2004).