Year

2011

2012

2013

2014

2015

2016

Total

Total Obs.

164

786

967

1228

1567

1563

6275

Obs. of disclosure group

29

521

660

871

943

988

4012

The proportion of disclosure group

17.68%

66.28%

68.25%

70.93%

60.18%

63.21%

63.94%