?????????? was meshured tu be...???????? kant yu kount??????
1991: kount=3710
1998: kount=4130
delta kount=420, delta yeer=7
gro rate=420/7=60 per yeer
based on 1990: kount=3650+60*(yeer-1990)
yeer=2002...deltayr=2002-1990=12
delta kount=60*12=720
kount=3650+720=4370