年龄段

比例

15~19

20~24

25~29

30~34

35~39

40~44

45~49

2006

17%

36%

37%

6%

2%

2%

1%

2007

18%

36%

33%

7%

2%

1%

2%

2008

18%

34%

33%

7%

3%

2%

2%

2009

18%

35%

32%

7%

3%

2%

2%

2011

20%

39%

32%

6%

2%

3%

1%

2012

20%

39%

29%

7%

2%

3%

1%

2013

22%

35%

26%

9%

1%

4%

1%

2015

21%

38%

27%

8%

1%

3%

1%