Table 1.

Descriptive statistics for yearly rates of traffic-related fatalities per 100,000 vehicles registered by treatment group, defined as year of program adoption

Year of adoption	N	Pre-treatment1			Post-treatment1
		Median	25th percentile	75th percentile	Median	25th percentile	75th percentile
2013	54	5.76	3.92	11.54	3.61	2.37	7.2
2014	16	5.13	2.65	6.29	3.21	1.85	4.29
2015	16	3.04	2.55	9.32	2.09	1.67	5.68
2016	10	3.38	2.42	6.07	2.42	1.89	3.97
2017	7	4.4	2.57	8.36	2.78	1.71	4.56
2019	2	4.99	1.84	8.14	3.06	1.56	4.57
Did not adopt	1	3.9	3.9	3.9	–	–	–

¹Pre-treatment and post-treatment periods vary by group. For example, for municipalities that adopted the program in 2013, the pre-treatment period included data from 2005 to 2012 and the post-treatment period included data from 2013 to 2019. For municipalities that adopted the program in 2014, the pre-treatment period included data from 2005 to 2013 and the post-treatment period included the years 2014–2019