Age | |||||||
---|---|---|---|---|---|---|---|
Year | 14 | 15 | 16 | 17 | 18 | 19 | Total |
*The observation period ends in February 1998 and we present the data for the two first months of 1998 jointly with that for the year 1997. †In the statistical analyses data were used to the precision of month. The person years in this table are rounded to the nearest integer. | |||||||
Number of pregnancies | |||||||
1987 | 3 | 3 | 18 | 27 | 52 | 74 | 177 |
1988 | 0 | 9 | 15 | 34 | 39 | 67 | 164 |
1989 | 2 | 5 | 21 | 34 | 58 | 82 | 202 |
1990 | 1 | 9 | 4 | 39 | 44 | 69 | 166 |
1991 | 3 | 12 | 21 | 35 | 101 | 120 | 292 |
1992 | 1 | 10 | 10 | 38 | 40 | 103 | 202 |
1993 | 3 | 5 | 44 | 31 | 75 | 103 | 261 |
1994 | 0 | 10 | 17 | 62 | 73 | 136 | 298 |
1995 | 3 | 7 | 21 | 42 | 124 | 155 | 352 |
1996 | 0 | 6 | 12 | 34 | 74 | 152 | 278 |
1997/1998* | 1 | 7 | 26 | 40 | 125 | 152 | 351 |
Total | 17 | 83 | 209 | 416 | 805 | 1213 | 2743 |
Number of person years† | |||||||
1987 | 800 | 901 | 846 | 945 | 931 | 1031 | 5454 |
1988 | 182 | 953 | 897 | 1003 | 940 | 1095 | 5071 |
1989 | 361 | 396 | 1086 | 1067 | 1129 | 1105 | 5143 |
1990 | 215 | 396 | 395 | 1109 | 1062 | 1146 | 4323 |
1991 | 1121 | 1191 | 1230 | 1298 | 1786 | 1863 | 8489 |
1992 | 198 | 1290 | 1191 | 1381 | 1290 | 1905 | 7254 |
1993 | 1066 | 1168 | 2197 | 2183 | 2214 | 2175 | 11003 |
1994 | 218 | 1232 | 1165 | 2365 | 2173 | 2349 | 9502 |
1995 | 795 | 832 | 1882 | 1850 | 2819 | 2671 | 10848 |
1996 | 212 | 903 | 830 | 1993 | 1842 | 2873 | 8652 |
1997/1998* | 772 | 1178 | 1497 | 2004 | 2581 | 3338 | 11370 |
Total | 5938 | 10441 | 13216 | 17198 | 18767 | 21549 | 87108 |