The dividends are done per share. Each share can expect a min 12% return of the share price (0.05 BTC) per annum. The exact weekly payout will vary check out this spreadsheet which will be updated weekly:

https://docs.google.com/spreadsheets/d/1qzz-hPnUbmg0c0RaYMc7EY9ijiQujIuo3iaQs8yi1tw/pubhtml