In millions. Statistics from United Nations. Their low variant.
“Population problems are of extreme importance….they have a vital bearing on world peace”
Mgr Giovanni Battista Montini (the future Pope Paul VI) writing to the Twenty-sixth Italian Catholic Social week in 1953. (See The Encyclical That Never Was – The Story of the Pontifical Commission on Population, Family and Birth 1964-66 by Robert Blair Kaiser Sheed and Ward, London 1987)
The Commission voted for a change on the Catholic teaching on artificial contraception: nine votes for change, three for no change, three abstentions.