1995
7%
33%
68%
90%
2003
7%
29%
65%
90%
2007
6%
24%
61%
89%
2011
9%
29%
63%
89%
2015
7%
30%
64%
89%
2019
11%
36%
68%
90%
2023
11%
34%
64%
87%