/ → → → ( ) 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 11 12 13 14 15 16 17 18 19 20 21 22 30 35 40 45 50 55 11 12 13 14 15 16 17 18 19 20 21 22 1 (2011 1 12 18 ) 2 (2011 2 3 9 ) (a) [%] (b) 1 • • • • • [ ] [ ] [%] [ ] 0 50 100 150 200 250 11 12 13 14 15 16 17 18 19 20 21 22 [ ] [ ]