47 50 (a) (b) (c) (7) 11 10 2018 20 2028 16
17
18
19
20
21
22
20 90.1 9.9 20 87.2 12.8 2018 10 17 6.916.0 7.87.4 40.511.6 23
0.0% 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2.0% 4.0% 6.0% 8.0% 10.0% 12.0% 14.0% 6 24
25
10.0% 5.0% 0.0% 5.0% 10.0% 15.0% 20.0% 25.0% 30.0% 35.0% 7 26
27 20.0% 15.0% 10.0% 5.0% 0.0% 5.0% 35.0% 30.0% 25.0% 20.0% 15.0% 10.0% 5.0% 0.0% 5.0%
8 28
30.0% 20.0% 10.0% 0.0% 10.0% 20.0% 30.0% 40.0% 50.0% 30.0% 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 20.0% 10.0% 0.0% 10.0% 20.0% 30.0% 40.0% 50.0% 29
30
20 2018 10 11 24 4.0% 2.0% 0.0% 2.0% 4.0% 6.0% 8.0% 10.0% 12.0% 14.0% 31
(a)(b) (c) 2009 2018 32
33
34
35
36