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In 2008, 66% of births were to parents in a registered marriage, compared to 81% in 1988.
The proportion of births to parents outside registered marriages has increased steadily since 1975. In 2008, 34% of all births registered were to parents who were not in a registered marriage, compared to 19% in 1988.
The proportion of births where the father has not acknowledged the birth (by not signing the birth registration form) has decreased from 5% in 1988 to 3% in 2008.