???????????? "was meashured tu be" ????????????... ?????? sumwon no how tu kount ????????????? start: yeer=1994, kount=3340... 2...yeer=1996, kount=3200, delts=-140, delta/yeer=-70 (per yeer)... formula with base yeer=1990...delta yeer=-4, so delta=(-4)*(-70)=280... 3340+280=3,620=kount for yeer=1990.. formula: kount=3,620 -70*(yeer - 1990)... yeer=2009...yeer-1990=19, delta=19*(-70)=-1330, kount=3,620-1330... =2290