Weighted class

2010

2011

2012

2013

2014

2015

Average 2010/15

0%

54%

59%

65%

56%

56%

49%

57%

20%

12%

11%

7%

16%

18%

12%

13%

35%

6%

3%

2%

7%

5%

7%

5%

50%

3%

3%

4%

2%

2%

2%

3%

75%

8%

5%

5%

5%

6%

6%

6%

100%

16%

18%

16%

13%

11%

21%

16%

150%

1%

1%

1%

1%

2%

3%

2%

Total

100%

100%

100%

100%

100%

100%

100%