Why now many pay searches engine bid low pity?

Type of Payment Quantity Earnings
7 S" ~! k* a' s8 x. xDate: 05/18/2004 Clicks By Referrals 81 $0.4543
' \! k7 ~4 g) H" r5 ]8 X0 D6 rDate: 05/19/2004 Clicks By Referrals 141 $0.483
Date: 05/26/2004 Clicks By Referrals 64 $0.1235

3 V8 X( m' b& B% e: A* m3 B
& ?+ s, a4 N8 k& W  W# l2 j0 xWhy now many pay searches engine bid low pity?And has the more and more low tendency! Worried!