12
11.4
10
8
8
6.8
6
5.4
4
2
0
2014
2016
2019
2022
12
11.4
10
8
8
6.8
6
5.4
4
2
0
2014
2016
2019
2022
12
11.4
10
8
8
6.8
6
5.4
4
2
0
2014
2016
2019
2022
12
11.4
10
8
8
6.8
6
5.4
4
2
0
2014
2016
2019
2022
SOURCE: CEB, 2016; GARTNER, 2019; RACONTEUR, 2022