Weighted class

2010

2011

2012

2013

2014

2015

Average 2010/15

0%

25%

21%

24%

24%

27%

29%

25%

20%

3%

5%

2%

1%

1%

2%

2%

35%

8%

6%

12%

12%

12%

12%

10%

50%

12%

15%

9%

9%

7%

7%

10%

75%

9%

12%

11%

11%

8%

6%

10%

100%

37%

35%

34%

36%

39%

41%

37%

150%

5%

7%

6%

7%

6%

4%

6%

Total

100%

100%

100%

100%

100%

100%

100%