Why now many pay searches engine bid low pity?

Type of Payment Quantity Earnings
3 K1 W7 L, B* u$ O3 o0 oDate: 05/18/2004 Clicks By Referrals 81 $0.4543
; e6 z1 k. k# P6 E2 rDate: 05/19/2004 Clicks By Referrals 141 $0.483
# v) o. D* C% R* T9 R% rDate: 05/26/2004 Clicks By Referrals 64 $0.1235
- X$ T# G! R1 o& {
/ Z4 x. l4 t) k; z$ J. X
Why now many pay searches engine bid low pity?And has the more and more low tendency! Worried!