Of the 60 organs transplanted in Wales between December and June, half came from people whose consent had been deemed. The organs were provided from 31 people, 10 of whom had not explicitly confirmed that they wanted to become donors.
The Welsh government launched the initiative in December last year in an attempt to increase the number of organs available for life-saving transplants.
Before the law was changed, 23 people donated their organs in the same period in 2014-15, and 21 in 2013-14.