2011
70.7
29.3
2012
70.6
29.4
2013
71.3
28.7
2014
71.9
28.1
2015
72.4
27.6
2016
73.2
26.8
2017
73
27
2018
73.8
26.2
2019
74.3
25.7
2020
74.7
25.3
2021
73.7
26.3