|
|
|
2017 |
|
2016 |
|
2015 |
|
||||||
|
|
|
Common shares |
|
Preferred shares |
|
Common shares |
|
Preferred shares |
|
Common shares |
|
Preferred shares |
|
|
Balance at beginning of the year |
|
571,929,945 |
|
1,137,018,570 |
|
571,929,945 |
|
1,114,744,538 |
|
571,929,945 |
|
1,132,613,562 |
|
|
Acquisition of Treasury shares |
|
— |
|
— |
|
— |
|
(10,000,000 |
) |
— |
|
(19,923,200 |
) |
|
Exercise of stock options |
|
— |
|
308,614 |
|
— |
|
2,274,032 |
|
— |
|
2,054,176 |
|
|
Transfer of shares |
|
— |
|
— |
|
— |
|
30,000,000 |
|
— |
|
— |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Balance at the end of the year |
|
571,929,945 |
|
1,137,327,184 |
|
571,929,945 |
|
1,137,018,570 |
|
571,929,945 |
|
1,114,744,538 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|