Table 4.

Bullying typology over time (n=13,885 girls, n= 3,688 boys)

Source: 2001/02–2017/18 German HBSC study

Survey year	Uninvolved (%)	Bullies (%)	Suffered bullying (%)	Double role bully and bullied (%)
2002 (n=5,554)	73.7a	13.2d	9.5	3.7i
2006 (n=7,166)	77.3b	8.8e	11.2h	2.7j
2010 (n=4,974)	81.4c	8.4f	8.6	1.6
2014 (n=5,682)	83.2	7.5g	7.8	1.4
2018 (n=4,197)	86.7a,b,c	3.9d,e,f,g	8.3h	1.1i,j

Lower case letters indicate significant differences between a specific year and 2018 for the respective bullying role (p < 0.001).