Births

6   Average age at birth. 1946-2000
Period Observed age at first birth1 Hypotetic age at the birth2
Mean age at first birth Mean age at all births Average Median3
All first births First births in wedlock
1946-1950 .. 26,9 .. 29,8 28,9
1951-1955 .. 26,1 .. 28,7 27,5
1956-1960 .. 25,3 .. 28,1 26,7
1961-1965 .. 24,1 .. 27,8 26,4
1966-1970 .. 23,6 .. 27,3 26,0
           
1971-1975 .. 23,4 26,0 26,6 25,4
1976-1980 .. 24,8 26,4 26,7 25,7
1981-1985 .. 25,8 27,1 27,2 26,3
1986-1990 25,2 26,6 27,7 27,8 27,0
1991-1995 26,1 27,7 28,5 28,6 27,9
1996-2000 27,1 28,6 29,3 29,1 28,5
           
1987 25,1 26,4 27,6 27,7 26,9
1988 25,2 26,6 27,7 27,8 27,0
1989 25,3 26,8 27,8 28,0 27,2
1990 25,5 27,0 28,0 28,1 27,4
           
1991 25,7 27,3 28,2 28,3 27,6
1992 25,9 27,5 28,3 28,4 27,7
1993 26,0 27,7 28,5 28,6 27,9
1994 26,3 28,0 28,7 28,7 28,0
1995 26,5 28,0 28,8 28,8 28,2
           
1996 26,7 28,3 29,0 28,9 28,3
1997 27,0 28,5 29,2 29,1 28,4
1998 27,2 28,8 29,3 29,2 28,5
1999 27,2 28,6 29,5 29,2 28,6
2000 27,3 28,7 29,6 29,3 28,7
1  Based on actual births in the period.
2  This 'hypothetic' age at birth is not being influenced by cohort size variations, as opposed to the 'observed' age at birth.
3  The age where one half of the women was younger or had exactly reached that age.
Source: REP Cohort and Period Fertility in Norway 1820-1993.

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