yeer= 1986, folk kount=37,200... yeer=1994, folk kount=42,000... delta kount=4, 800; delta yeer=8; gro rate=4,800/8=600/yeer... want gro equashun with base yeer=1984... projekt bak 2 yeers & get 1984 kount=37,200-1200=36,000... kount=36,000+600(yeer-1984)