2010

2011

2012

Chi-square value

p level

Ken-poku [n (%)]

152 (25.17)a

164 (26.89)a

87 (14.36)b

284.22

p < 0.01

Z

2.19

3.46

−5.65

Ken-chu [n (%)]

180 (29.80)

191 (31.31)

203 (33.50)

Z

−1.12

−0.15

1.27

Ken-nan [n (%)]

35 (5.79)

30 (4.92)b

59 (9.74)a

Z

−1.22

−2.28

3.50

Aizu [n (%)]

133 (22.02)a

22 (3.61)b

144 (23.76)a

Z

4.54

−10.48

5.97

Minami-Aizu [n (%)]

10 (1.66)

0 (0.00)b

15 (2.48)a

Z

0.73

−3.58

2.85

Soso [n (%)]

4 (0.66)b

99 (16.32)a

17 (2.81)b

Z

−7.19

11.76

−4.60

Iwaki [n (%)]

67 (11.09)

90 (14.75)a

62 (10.23)

Z

−0.87

2.53

−1.67

Outside [n (%)]

23 (3.81)

14 (2.30)

19 (3.14)

Z

1.27

−1.37

0.10